RODINE 85 PREVENTING METALS FROM ACID CORROSION – ChemEqual

In many industrial operations metals such as steel and iron are subjected to very high temperature which often leaves a discoloring oxide layer or scale on the surface. The process of hot rolling, drawing, annealing and molding of metals result in the deposition of organic impurities, stains, rusts and scale which impede further metal processing. In industries same metals are used for a long period which makes them vulnerable to development of rust and surface deformation.

Pickling is the conventional method practiced in industries for removing rust and scales from metal surface. It is the removal of any high temperature scales from metal surface by chemical means. It involves dipping of the metal workpiece in acid solution referred to as “pickle liquor”. Earlier sulphuric acid was used in pickling process but now HCL has taken the prime position as it pickles much faster with minimum loss of base metal.

Corrosiveness of acid makes it difficult to handle. The acid reduces the protective oxide film on metals and thus expose the underlying metal to corrosion. The hydrogen present in the acids further reacts with the metal surface and ultimately builds up cracks. The acid often cause dissolution of the pure metal leading to metal loss.

An acid inhibitor   is thus added to the pickling solution to   reduce corrosion and prevents  the metal from dissolving or becoming pitted. Inhibitors may be natural or synthetic organic compounds which are added to pickling acid solution to reduce metal corrosion .They slow down the reaction between acid and base metals which help in controlling excessive fume generation during pickling. Inhibitor also aids in controlling pickling rate.

Rodine 85 is a low foaming liquid corrosion inhibitor intended for use in sulfuric acid pickling operations on various types of metals like copper, brass, nickel and all type of steel. It is formulated using 1, 3 Diethyl Thiourea, Propargyl alcohol, Formaldehyde, Substituted triazine & O-Toluidine and detergent. Rodine 85 shows activity at any acid concentration. Rodine 85 is an effective inhibitor for phosphoric and acetic acids, as well as sulfamic, citric, oxalic, and sodium bisulfate solutions in pickling and industrial cleaning operations.

Rodine 85 reduces  corrosive attack  of acids on the clean metal to a minimum, which reduces the amount of sludge formed in pickling baths also it helps in  reducing the consumption of acid and prolongs the life of the bath. It passivates the metal surface, to a considerable degree and makes it highly corrosion resistant. Rodine 85 allows pickling baths to be used at higher temperature, which leaves the surface of the metal chemically clean and ready for the application of finishing coatings such as plating, painting or lacquering; It improves the appearance of the pickled metal by creating a uniformly whiter (i.e. more silvery) surface, thus improving its solubility. Other advantages are the elimination of gases and fumes in the pickling process and the prevention of acid brittleness of the steel.

Rodine 85 dosage greatly depends on the type of metal, the temperature of operation and the sequence of cleaning operation. The recommended amount of Rodine 85 to be used for pickling is always given in percent by volume of the concentrated acid, regardless of the degree of acid dilution used. RODINE 85 should be used at a concentration ranging from 0.05 to 0.30 percent by volume of the diluted acid regardless of the degree of acid dilution used. In addition, it is recommended that Rodine 85 inhibitor be used at a concentration not less that 0.5% by volume of the concentrated liquid acid or not less that 0.5% by weight of the concentrated solid acid, regardless of the temperature of the industrial cleaning operation.

The key features can be summarized as follows

• Strong inhibitor with detergent improves rinsability

• Aids in attaining maximum cleanliness on  nickel work
• Low foaming inhibitor for general purpose inhibition

ChemEqual, the largest chemical marketplace gives the opportunity to buyer to compare and buy Rodine 85 chemicals and its equivalents from the global manufactures.

Organic Acid Inhibitor Rodine 92B – ChemEqual

Effective cleaning of equipment in the food processing industry is required to reduce chances for contamination of during preparation, processing, storage & serving. Cleaning prevents attraction of lower life forms like food pathogens, increases equipment life, boosts employee morale and efficiency and accounts for aesthetic considerations of consumers. The primary cleaning agent is water; free from disease producing organisms, toxic metal ions and objectionable taste & odor. But such quality of cleaning water is hard to achieve and chemicals are tailored to meet cleaner specifications based on water composition and operation type.

Acid Type Cleaners & Corrosion:

Acid cleaners are used in the food processing industry for milkstone removal and cleaning equipment like broth tanks, ingrediators etc. A wide choice of acid type cleaners for mineral scale removal exist today but organic acids and blends of organic acid type cleaners and chelating agents have found much popularity in recent times. This is because they are much less corrosive than mineral acids and alkaline cleaners. Citric acid and EDTA are frequently used for this purpose owing to a better pH regulation and less aggressive surface action.

Nevertheless, acid cleaning chemicals are corrosive to the base metal and are responsible for corrosion & pitting of surface. Inhibitors for Citric Acid descaling solution are usually applied at very low concentrations (1000-3000 ppm) to provide upto 99.8% corrosion inhibition during acid cleaning processes. Depending on the acid type used, specific corrosion inhibitors are designed to remove scales and deposits from equipment while minimizing base metal loss. They are of mostly polymeric origin and act by forming chelating structures, proving high efficiency as inhibitors in acid chemical cleaning operations.

RODINE 92B is a blend of semi-foaming corrosion inhibitors specifically formulated for preventing corrosion by Citric acid and EDTA based cleaners. It is highly efficient at protecting metal surfaces such as steel and copper alloys commonly associated with equipments in food processing and packaging industry. It has been shown to assist in surface cleaning and descaling actions by acid cleaners without any pitting or corrosion on metal surface.

With respect to the nature of industry where rodine acid inhibitors are used, toxicity issues for inhibitors is of prime concern & exposure to humans due to improper/inadequate rinsing is a possibility. Rodine 92B has been designed for such special applications and contains ingredients generally recognized safe to humans thus suitable for cleaning of food equipments.

Key product features are:

• Modifies metal surface to prevent corrosion
• Excellent wetting properties for better cleaning
• Enhances cleaning efficiency

Rodine 92B is effective upto a temperature of 85°C/185°F and can be applied in all types of food processing, packaging & storage industries as inhibitor for acid cleaning systems.

ChemEqual is a online global chemical marketplace for Acid Inhibitors where Rodine type & its equivalent inhibitors can be found.

Nalco PermaTreat PC-191 Highly Effective RO Membrane Antiscalant – ChemEqual

Reverse osmosis is a water purification technique developed in 1950’s by US government to remove dissolved solids in saline and brackish water. The principle involves application of waterline pressure over untreated water against a semipermeable membrane. The separated H₂O molecules pass through the membrane into a reservoir while contaminants remain on the other side. Over the years, RO has been extensively used for treating industrial feed water. While the primary method for demineralization is Ion exchange method, RO systems are adopted when large volumes of water need to be treated economically.

The life, efficiency & productivity of an RO Membrane water treatment system is greatly reduced due to a phenomenon called RO Membrane Scaling. During RO system operation, as the water moves through the membrane, the concentration of dissolved and suspended solids keep on increasing at the boundary layer. When the concentration exceeds saturation value, there occurs a tendency of deposition and crystallization on the membrane surface. Smaller depositions act as nuclei for more salt accumulation thus decreasing effectiveness of membranes and invoking frequent cleaning of the system. Scalants mostly include low soluble salts of calcium, barium, strontium as carbonates and sulfates and fine reactive silica crystals. Their low solubility makes them difficult to remove during cleanup processes.

Scaling can be minimized by pretreatment processes like ion exchange, chemical treatment like lime softening etc. but these incur higher costs.  In some cases, acidification is practiced to remove insoluble carbonates and sulfates and most commonly Hydrochloric Acid is used. Recently, the popular choice of RO scale treatment is the use of Antiscalants. Reverse Osmosis Antiscalants are specialized chemical formulations added to the untreated feed water to increase the solubility of sparingly soluble salts that cause scaling. They mostly comprise of acrylates and phosphonates that greatly inhibit carbonate and sulfate precipitation. Since they offer an online scale protection advantage, RO Antiscalants have become an essential part of operations involving reverse osmosis systems. Such systems avoid mineral scaling and need less frequent cleaning, show greater efficacy with high permeate quality, decreased water and energy consumptions and longer operation life.

Nalco PermaTreat PC-191 is an RO Membrane Antiscalant manufactured by Nalco Company. It is a highly effective scale inhibitor engineered specifically for RO systems. It is suitable for treating brackish, highly saline and effluent feed water in RO filtration, Nanofiltration and Ultrafiltration systems. It is compatible with all types of RO membranes and can extend membrane life thus cutting down operating and maintenance costs.

Nalco PermaTreat PC-191’s characteristics can be ideally summarized as:

• Effective against scales of calcium, strontium, barium salts of carbonate, sulfate and oxide origin
• Zero scaling in system upto 2.6 LSI
• Cleans by dispersing particulate fouling
• Effective even at low feed water pH upto 5.9
• Can be fed directly or as diluted solution in system
• Prevents formation of Iron scales

Nalco PermaTreat PC-191 helps resolve all scaling issues in RO Filtration systems and at all instances, the costs incurred are lower than would be for Ion exchange hardness removal methods.  ChemEqual is the most trusted speciality chemical global marketplace based in USA with over 700+manufacturers and 30K products listed. Search for required Speciality Chemical products and its suppliers, manufacturers or its equivalent
brands from the largest database of ChemEqual.

NALCOOL 2000 Nitrite based Diesel Engine Corrosion & Scale Inhibitor – ChemEqual

Tropical coolants are water based need coolant additives for mineral salt suppression that may negatively affect heat transfer operations and corrode/scale inner walls of cooling systems. The Cooling System is itself a very aggressive environment and is subjected to a small volume of coolant that is propelled through the system at very high velocity at extremes of temperatures that can easily cause scaling and corrosion to metal components leading to equipment failure at any time.

NALCOOL 2000 manufactured by NALCO is a coolant corrosion inhibitor blend made from Sodium Nitrite, Sodium Tetraborate, Sodium Metasilicate, Sodium Mercaptobenzothiazole that functions as a protective, film-forming corrosion inhibitor and scale suppressant to keep engines clean and free from scale, and reduces downtime and maintenance costs. The product protects cooling systems against corrosion, liner pitting, cavitation-erosion, mineral scale deposits and electrolysis. In addition, it helps reduce the effect of oxidizing agents that are commonly dissolved in most tropical coolants.

It has been designed for all common engine cooling systems and is ideal to protect ferrous metals, copper & its alloys, aluminium etc. as well as rubber gaskets, ‘O’rings and non-metallic components within the cooling system. NALCOOL 2000 is available in liquid form making it easy to use and apply, fully compatible with water based coolants and Mono Ethylene Glycol antifreeze. It is chromate free and has been tested internationally to maintain a high degree of heat transfer efficiency & long engine life.

Product Features & Benefits:

• Designed to protect cast iron diesel engine cooling systems
• Contains additives to protect against sludge and mineral scale formation
• Prevents overheating
• Effective against liner pitting and cavitation erosion
• Liquid, safe & easy to apply formulation
• Not harmful to radiator or heater connecting hoses, diesel liner seals and ‘O’rings
• Recommended and used by major diesel engine manufacturers throughout the world

NALFLEET NALCOOL 2000 is the perfect corrosion & scale inhibitor for all types of heat transfer fluids in small auxiliary diesel engines containing aluminium components.

ChemEqual is a vast online specialty chemical database and NALCOOL 2000 and equivalent compositions of coolant corrosion inhibitors can be searched here from among a wide range of global suppliers.

Premium CIP Cleaning for Food Processing equipment with NALCLEAN 8940

The simplest forms of non-toxic cleaners used in food processing industries are basically blends of mineral acids and inhibitors. Acid circulation is considered effective in removal of encrusted proteins and mineral deposits on heat treatment surfaces. HCL based cleaner for food processing industries has gained immense popularity in recent years with respect to CIP processes owing to its quick action, high solubility and easy rinsability. It can be used directly to clean or as a neutralizing solution after alkaline wash. It enhances removal of mineral deposits like hard water scale, milk stone, beer stone etc. Typical concentrations in solutions range from 30%-70% that require appropriate dilution before application based on industry, equipment, nature of contamination, topography of surfaces to be cleaned and application methods.

NALCLEAN 8940 is a carefully designed hydrochloric acid based acid cleaner with proper corrosion inhibitors and surfactant chemicals and acts as a low foaming cleaning liquid. It is a heavy duty formulation for complete removal of difficult mineral and protein base soils, water scales, corrosive depositions and hard deposits due to its surfactant based enhanced deposit penetration capacity.

Product Benefits:

• Attacks rust, scale and deposits; but not base metal
• Cleans complex equipment without dismantling
• Penetrates and disperses acid-soluble deposits
• Provides moderate foaming to minimize acid fuming

NALCLEAN 8940 can quickly remove hardness scales and metal oxide deposits from boilers, heat exchangers, condensers, evaporators, cooling jackets, process vessels, piping and other equipment with metal parts where chloride stress corrosion is not a factor, equipments commonly found in food processing plants, dairy industry and beverage sector.. It is recommended for use as an acid cleaner in all departments & establishments operating under government meat, poultry and shell egg grading and egg products inspection programs.

ChemEqual is a vast online chemical marketplace and B2B search engine where various grades of application specific acid cleaners and cleaning chemicals can be searched and enquired.

Sanosil – Hydrogen Peroxide with Silver as an all purpose disinfectant at ChemEqual

Hydrogen Peroxide has long been known for its oxidizing capabilities. But, its unstable nature made it highly unsafe and short lasting. Use of Silver as stabilizer and activator is the ideal solution to this problem. Silver stabilized hydrogen peroxide is efficiently used for soil fumigation, air sanitation, water disinfection, even surface disinfection. Silver with antimicrobial properties and the intense oxidizing effect of H₂O₂ can be used as an eco-friendly and powerful disinfectant with an assortment of utilizations.

Sanosil-Silver H₂O₂ is the only EU Biocide Article 95 compliant Hydrogen Peroxide/Silver based disinfectant approved for use in the UK by the HSE and NHS and used widely by the water treatment sectors, decontamination sectors as well as home care, hospitality and pharmaceutical sectors worldwide. The product is specified by the NHS to combat MRSA. The unique disinfection properties of silver stabilized hydrogen peroxide are intrinsically and environmentally safe to use in medical, clinical and most other built environments.

Sanosil disinfectant works in a combined 2-phase effect of the main ingredients. The nascent oxygen from hydrogen peroxide attacks cell walls of microorganisms upon direct contact. Nascent oxygen denaturizes the cell wall and disrupts cytoplasm stability. This effect is boosted by silver ions that disrupt protein activities associated with reproductive and metabolic systems and deactivates them resulting in rapid cellular degradation and microbial death.

Silver H₂O₂ disrupts the cellular membrane of microorganisms and attacks internal cell structure and processes. H₂O₂ decomposes into water and oxygen (2H₂O_{2 –>} 2H₂O+O₂) and traces of nano silver form residue on the disinfected surface. These silver traces are invisible and non-toxic but actively and effectively counteract re-germination and re-growth.

Common disinfectants in the market focus their effect on one single point of attack which may be sufficient to kill germs in the short term however; monovalent biocides result in evolution of resistant germ strains and become increasingly ineffective over time. Sanosil is regarded as “smart” technology and less problematic as it does not allow development of resistance.

To date and based on ongoing worldwide studies, there is no human pathogen that has managed to develop a resistance to Sanosil.

Sanosil range of formulations for professional use is predominantly preferred as:

• surface cleaner
• low level water system continuous dosing agent
• water distribution system treatment for bio-film removal
• dental chair unit (DCU) waterline additive

The available formulations are:

Sanosil S003 (1.5% H₂O₂): Fogging aerosol disinfectant for low level germ loads

Sanosil S006 (3% H₂O₂):  Fogging aerosol disinfectant for moderate level germ loads

Sanosil S010 (5% H₂O₂): Fogging aerosol disinfectant for high level germ loads and particularly effective in combating bacteria, viruses, yeasts, mildew, fungi, molds spores and malodorous smell.

As per the EEC, WHO, and the USEPA, Sanosil silver hydrogen peroxide represents no health threats to people. Even Switzerland, France, Australia and Germany have approved silver hydrogen peroxide for drinking water sanitation.

ChemEqual is a vast B2B online database where all types of silver hydrogen peroxide based disinfectants and their equivalents can be found easily.

Rodine 31A – Corrosion Inhibitor to limit acid attack on base metals

Formulated with an acidic blend of complex alkyl pyridines, 1, 3-diethyl thiourea, Rodine 31A serves as an aliphatic nitrogen corrosion inhibitor that provides protection to brass, steel and copper metals against the attack of sulfuric, phosphoric, sulfamic, formic acid, acetic oxalic acid, citric acid, bisulfate solution and mixtures thereof and conditionally for hydrochloric acid solutions. Rodine 31A Corrosion Inhibitor presents itself as a chloride free inhibitor. It has a maximum operating temperature of 180°F. It imparts excellent pickling and modifies the metal surface to help in the prevention of corrosion.

Acidic treatment is important in providing protection to the metals used in the industries against scaling and rusting. This acid treatment is mostly carried out variously to assist in the eradication of scale and rust but instead & often triggers abrasion of metals as they exhibit corrosive properties. This process not only influences the metal properties but also causes loss of base metals after acid solution pickling. Acidic Corrosion often causes gradual wearing off of material by acidic compounds.

This acidic corrosion is an electrochemical process which is directed by the diffusion of moisture, oxygen and availability of acidic pollutant on the metal surfaces. This brings about the requirement of acid inhibitors to aid in limiting the acid corrosion on base metal, therefore helping reduce the economical loss in several industrial sectors. The type and concentration of the corrosion inhibitor used is generally derived based on the type and properties of the metal to be protected and the conditions under which the metal is to be treated. Rodine 31A Corrosion Inhibitor is an acid inhibitor specifically to protect metals from corrosion by organic and mineral acids

Features:

-Single product for multiple acids

-Helps in imparting excellent pickling

-Modifies metal surface to prevent corrosion

-Chloride free and is easily soluble with all acid concentrations

ChemEqual is the largest online directory of chemical suppliers, consisting of a vast database of manufacturers & suppliers that deal with trading of Rodine 31A Corrosion Inhibitor or other acid corrosion inhibitor products.

DOWCAL 200 Inhibited Propylene Glycol based Heat Transfer Fluid – ChemEqual

Propylene glycol, also known as Propane-1,2-diol is used as a heat transfer fluid and antifreeze, particularly as a low corrosion non-toxic substitute to ethylene glycol based cooling systems. In aluminium based cooling systems like HVAC/R, propylene glycol has shown efficacy comparable to ethylene glycol.

Benefits of PG:

• Low freezing point
• The ability to decrease the freezing point of water
• Burst protection
• Low mammalian toxicity
• Low flammability
• Excellent heat transfer properties
• A high boiling point, low vapor pressure

Water based fluids expand in volume when they freeze, causing rupturing of pipes and containment vessels. Ethylene glycol has severe toxicological and environmental implications making it unsuited for cases of human exposure. Water-PG mixtures in low temperature conditions do not create extra pressure on vessel walls and in case of leakage, they are not hazardous. This makes Propylene glycol the ideal active ingredient as heat transfer fluid in industrial systems.

DOWCAL 200 manufactured by DOW Chemicals is propylene glycol based heat transfer fluid antifreeze that has a wide range of application.  It has been formulated to operate at temperatures higher than what ordinary glycol fluids can. It has a low acute oral toxicity and includes a specially designed inhibitor package to prevent corrosion of common materials used in HVAC, Food beverage processing, solar power plants etc.

Applications:

• Single fluid process heating and cooling
• Closed-loop water based heating & air conditioning systems
• Food and brewery industry
• HVAC systems
• Pharmaceuticals
• Secondary cooling and heating
• Freeze and Burst protection
• Renewable energy systems

ChemEqual is a unique online chemical and equivalents database and B2B marketplace where Propylene Glycol based antifreeze like DOWCAL 200 and its equivalents can be easily searched and enquired here.

RODINE 92B Acid Inhibitor for Food Processing equipment cleaners

Effective cleaning of equipment in the food processing industry is required to reduce chances for contamination of during preparation, processing, storage & serving. Cleaning prevents attraction of lower life forms like food pathogens, increases equipment life, boosts employee morale and efficiency and accounts for aesthetic considerations of consumers. The primary cleaning agent is water; free from disease producing organisms, toxic metal ions and objectionable taste & odor. But such quality of cleaning water is hard to achieve and chemicals are tailored to meet cleaner specifications based on water composition and operation type.

Acid Type Cleaners & Corrosion:

Acid cleaners are used in the food processing industry for milkstone removal and cleaning equipment like broth tanks, ingrediators etc. A wide choice of acid type cleaners for mineral scale removal exist today but organic acids and blends of organic acid type cleaners and chelating agents have found much popularity in recent times. This is because they are much less corrosive than mineral acids and alkaline cleaners. Citric acid and EDTA are frequently used for this purpose owing to a better pH regulation and less aggressive surface action.

Nevertheless, acid cleaning chemicals are corrosive to the base metal and are responsible for corrosion & pitting of surface. Inhibitors for Citric Acid descaling solution are usually applied at very low concentrations (1000-3000 ppm) to provide upto 99.8% corrosion inhibition during acid cleaning processes. Depending on the acid type used, specific corrosion inhibitors are designed to remove scales and deposits from equipment while minimizing base metal loss. They are of mostly polymeric origin and act by forming chelating structures, proving high efficiency as inhibitors in acid chemical cleaning operations.

RODINE 92B is a blend of semi-foaming corrosion inhibitors specifically formulated for preventing corrosion by Citric acid and EDTA based cleaners. It is highly efficient at protecting metal surfaces such as steel and copper alloys commonly associated with equipments in food processing and packaging industry. It has been shown to assist in surface cleaning and descaling actions by acid cleaners without any pitting or corrosion on metal surface.

With respect to the nature of industry where rodine acid inhibitors are used, toxicity issues for inhibitors is of prime concern & exposure to humans due to improper/inadequate rinsing is a possibility. Rodine 92B has been designed for such special applications and contains ingredients generally recognized safe to humans thus suitable for cleaning of food equipments.

Key product features are:

• Modifies metal surface to prevent corrosion
• Excellent wetting properties for better cleaning
• Enhances cleaning efficiency

Rodine 92B is effective upto a temperature of 85°C/185°F and can be applied in all types of food processing, packaging & storage industries as inhibitor for acid cleaning systems.

ChemEqual is a online global chemical marketplace for Acid Inhibitors where Rodine type & its equivalent inhibitors can be found.

NALCOOL 2000 – Automobile Coolant Corrosion Inhibitor

Corrosion and scaling in automobile cooling systems is primarily by chemical reaction of oxidizing agents in the coolant on the metal components. The type and nature of materials present at heat exchanging surfaces, the temperature of the system, pH and type of corrosive elements present in the coolant determine the type of inhibitor package needed.

Conventional water based coolants constantly need additives in the form of mineral inhibitors such as phosphates, nitrites and borates for poplar heat exchange surface metals like aluminium, copper etc along with other parts made from cast iron & mild steel. Absence of suitable inhibitors can cause corrosion, metal cavitation, scaling and cause leaks by destruction on rubber gaskets and head caps. Liquid coolant additives serve ideally as easy to use blends that can be directly mixed with coolant water for easy and quick anti-corrosive action on coils, coolant pump and radiator fins.

Corrosion inhibitors are generally blends of chemicals added to the coolant water to reduce material loss and system damage due to oxidation. The prerequisite is a passivation agent to coat the metal surfaces preventing further corrosion followed by neutralization of oxidizing ions in the coolant thus reducing cavitation. Best corrosion inhibitors need to be fast acting and thermally stable so as to operate at high temperatures and high coolant flow rate. Nitrite, Borate, Silicate and Polyacrylate formulations seem to be the most popular as corrosion and rust inhibitors. This is due to the fact that they are able to remove most oxidizing agents in common coolants while passivating metal surfaces for a long lasting corrosion control. The only requirement is to keep a steady inhibitor concentration in the system.

NALCOOL 2000 manufactured by Nalco Company is a synergized inhibitor blend for metal passivation and sale suppression as a water soluble corrosion inhibitor. It has been designed for all common engine cooling systems and is ideal to protect ferrous metals, copper & its alloys, aluminium etc. as well as rubber gaskets and non-metallic components within the cooling system. NALCOOL 2000 is available in liquid form making it easy to use and apply, fully compatible with water and ethylene glycol based coolants. It does not contain chromates and has been tested internationally to maintain a high degree of heat transfer efficiency & long engine life.

Outstanding features of the product include:

• Protection of all common cooling system metals
• Cavitation protection
• Minimized sludge and scale formation
• Liquid, safe & easy to apply formulation
• Compatible with wide range of coolants and dyes
• Approved by all leading automobile engine manufacturers

NALCOOL 2000 is the perfect corrosion & scale inhibitor for coolants in small auxiliary diesel engines containing aluminium components.

ChemEqual is a vast online specialty chemical database and NALCOOL 2000 as well as equivalent compositions of coolant corrosion inhibitors can be found here from among a wide range of global suppliers.