RODINE 213 Acid inhibitor Supplier Exporter – ChemEqual

Most metal hot working processes tend to leave a discoloring oxide layer or scale on the surface. Deposition of inorganic impurities, stains, rust and scales from ferrous, cuprous, aluminium and precious metal mostly as oxides hinder with further processes like extrusion, rolling and galvanizing. In jewellery making, soldering and annealing processes leave metal oxide residue that prevent polishing of ornaments. Such impurities are cleaned with the help of diluted solution of acids. The method is called pickling and the work piece is dipped in a vat of acid solution popularly called “Pickle Liquor”.

Hydrochloric acid replaced the commonly used Sulfuric acid as the pickling liquor because it pickles much faster with minimum base metal loss. The aggressive chloride ion in the acid is the key to high efficiency in the cleaning process. It is used for cleaning metals with an alloy content of 6% or less. An acid inhibitor must be added to the pickling solution to prevent the metal from dissolving or becoming pitted. Such a pickling acid solution is called “Inhibited HCL” and is a blend of Hydrochloric acid solution in water (3% to 10%) and an acid corrosion inhibitor which in itself is a blend of organic compounds that adsorb on the metal surface during pickling.

Rodine 213 is a premium organic blend of keto-amine complex substitutes with non-ionic surfactants, alcohol and solvents especially designed to inhibit attack of hydrochloric acid on metal surfaces during industrial operations like cleaning and pickling. It is effective over a wide range of metal surfaces like Iron & Steel, copper and brass. Rodine 213 is a high foaming formulation with a high efficacy at dispersing grease deposits and is ideal for HCL based pickling liquor solutions especially prior to plating.

It ensures metal surface protection during processes involving elimination of lime deposits from boiler and pipework and from evaporating plants, removal of oxide deposits from iron, steel, brass and copper. Rodine 213 is free from chlorinated hydrocarbons and heavy metals like arsenic and lead. It can be synergized with Hydrochloric acid pickling in stipulated concentrations both by circulation method and by soak and rinse method. Rodine 213’s exceptional strength and commendable heat stability makes it an ideal acid inhibitor during enhancement of the pickling process by pre-heating the equipment with the inhibited acid solution. It also acts as a strong acid fume suppressant.

Its key features can be summarized as follows:

• Modifies  metal surface to prevent corrosion
• Easy to use
• Excellent wetting properties for better cleaning
• Effective fume suppression
• Saves Zinc in galvanizing (Plating)
• Reduces metal loss
• Enriches strength of pickling acid bath, and reduces acid consumption

Rodine 213 has widespread industrial application in industries such as Iron & Steel, Power Station, Heavy Engineering Industries, Petrochemical & Refineries, Sugar Processing Industry, Cement, Glass & Ceramic Industries to name a few. 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
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Effective Sulfuric Acid Pickling with Rodine 85 – ChemEqual

Long term use of metal components in industries often makes them susceptible to formation of rust and surface distortion by scaling. In order to maintain surface quality and remove rust, acid treatment is employed. The metal parts are dipped in acid baths to oxidize and remove hard scales and rust layers. But since all acids have a corroding tendency with metals, acid treatment forms a root cause for concern particularly due to abrasive and corrosive loss of precious base metal leading to surface pitting and distortion.

Acid inhibitors are administered in acid pickling baths to prevent loss of base metal after proper pickling. It also helps to extend the life of acid baths. Using of inhibitor in acid solution limits the acid attack on base metal, therefore minimizing base metal loss. A potent acid inhibitor helps to alleviate acid attack on the base metal once the scale has been removed, lending protection to the surface and optimizing acid utilization.

Rodine 85 serves as a soluble, low foaming, liquid corrosion inhibitor formulated for use in conventional sulfuric acid pickling operations. It is an amalgamation of 1,3-Diethyl Thiourea, Formaldehyde, substituted Triazine & O-Toluidine, Propargyl Alcohol and detergent. Rodine 85 is effective on any type of steel, and can be used 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 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.

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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.

Metal Pickling: Acids and Inhibitors

Hot rolling processes associated with various metal industries often leave behind inorganic oxide residues on treated metal surfaces. Exposure to moisture also results in rusting of Ferro-Nickel based metal parts. These oxides interfere with further cold processing like polishing, electroplating, painting or enameling. Rust and scale formation is a thin layer of metal oxide on the surface that is mostly removed by chemical cleaning also called “Pickling”.

Pickling is carried out on oxide scaled surfaces of metals with alloy content less than 6%. The ideal pickling solution, known as Pickle Liquor is a 3%-10% solution of Hydrochloric acid (HCl) or Sulfuric acid (H₂SO₄). Hydrochloric acid is chosen over Sulfuric acid because of faster pickling action all the while minimizing base metal loss. It restricts formation of smut and greatly decreases the risk of excessive attacking.  It is also economic as heating expenses needed for sulfuric acid are spared due to possibility of lower temperature pickling.

Metal pickling is essential for thoroughly removing scales and inorganic surface contaminants before applying finishing layers like paint, galvanizing and polishing. The result of the process depends on the type, strength and temperature of the pickling liquor. In order to be economical, it is chosen as a continuous cleaning process by mode of manual/mechanized spraying or dipping in large acid vats. For small scale industries like jewellery making and research laboratories, extensive use of pickle pots is observed. Nevertheless, the corrosive action of diluted pickle acids cannot be ignored. In most cases, there is a significant loss of base metal during cleaning operations. For this reason, Acid Inhibitors are used with the acid solution to reduce base metal corrosion.

Inhibitors are natural or synthetic organic compounds added to acid solutions to reduce metal surface corrosion. They slow or stop the chemical action of acid on the base metal surface.

Inhibitors are essential to:

• Reduce base metal loss
• Protect the surface from pitting attack by excessive pickling or from poor surface condition quality
• Reduce fumes resulting from excessive acid-metal reactions
• Help economize acid consumption without reducing descaling efficacy
• Control the rate of pickling

Rodine Acid Inhibitor is a series of acid corrosion inhibitors designed to serve worldwide standards for acid inhibitors. They are specially synthesized to provide protection to base metals from acidic corrosion effectively. Rodine Acid Inhibitor products inhibit the corrosion of metals against acids like Hydrochloric, Hydrofluoric, Sulfuric, Phosphoric, Sulfamic, and organic acids blends. The most common products underlined in this range include Rodine 213, Rodine 213 Spl, Rodine 31A, Rodine 103, Rodine 103 NF, Rodine 92B, Rodine 130, and many more.

The process is limited to oxides and inorganic scales and contamination by soils, oil, grease, soaps and lubricants need additional processes with the use of Degreasing chemicals. Other limitations of acid pickling include difficulty to handle products because of their corrosive nature, the issue of hydrogen embrittlement popularly associated with some alloy and high-carbon steels, occupational hazards as the reactions produce toxic fumes in the factory shed. To obtain desired descaling, without endangering metal surfaces, acid concentrations and solution temperature need to be monitored quite strictly. Sludge is the ultimate waste product of acid pickling. It contains acid rinse water, metallic dissolved and suspended salts, waste spent acid etc. EPA considers it Hazardous waste and recommends proper treatment before disposal mostly in the form of Lime neutralization.