Acid Inhibitor Chemicals For Metals
Acid inhibitors, in terms of metal manufacturing and handling can also be called
acid corrosion inhibitors, rust preventatives or rust preventives (commonly termed or referred as Rodine). In essence, these are products that are used to permit corrosion protection to metals from strong and corrosive mineral acids like hydrochloric acid, nitric acid, sulfuric acid, sulfamic acid, hydrofluoric acid, phosphoric acid etc., and organic acids such as Cirtic Acid, Oxalic Acid, Formic Acid, Tartaric Acid, EDTA etc. against various applications as Acid Corrosion Inhibitors. Some of the applications are named as follows:-
Acid plant cleaning (CIP)
Heat exchanger, boilers and equipments descaling
Acid pH adjustment
Acid Pickling operations
Removal of CaCO3 in Oil Well Acidizing
HCL Acid Inhibitor (Rodine 213, Rodine 213 Special, Rodine 214, Rodine 103, Rodine 52)
Sulfuric Acid Corrosion Inhibitor (Rodine 130)
Sulfamic Acid Corrosion Inhibitor (Rodine 31A, Rodine 102)
Acid Pickling Corrosion Inhibitor (Rodine 85, Rodine 95, Rodine 50, Rodin 55, Rodine 130)
Citric Acid Inhibitor:
Citric acid is a weak organic acid. It is a natural preservative/conservative and is also used to add an acidic, or sour, taste to foods and soft drinks. In biochemistry, the conjugate base of citric acid, citrate, is important as an intermediate in the citric acid cycle, and therefore occurs in the metabolism of virtually all living things.
The inhibition effect of citric acid on the corrosion behaviour of aluminium in 2M NaCl solution (pH 2) was studied with the help of potentiodynamic polarisation, electrochemical impedance spectroscopy (EIS) and linear polarisation resistance (LPR) techniques. The experimental results showed that citric acid inhibits the
corrosion of aluminium in NaCl solution and the inhibition efficiency depends on its concentration. The protection efficiency increases with citric acid concentration up to a critical value of 1.0 10M. At higher concentrations, the inhibition efficiency reduced again with increasing concentration. The mechanism of inhibition was attributed to the adsorption of citric acid onto the metal surface at the time of cleaning, and de-scaling. We make use of high quality machines that insure accuracy in the formation of our mixtures.
Acetic Acid Inhibitor, Formic Acid Inhibitor:
Acetic is an organic compound with the chemical formula CH3CO2H (also written as CH3COOH). It is a colourless liquid that when undiluted is also called glacial acetic acid. Formic acid (also called methanoic acid) is the simplest carboxylic acid. Its chemical formula is HCOOH or HCO2H. It is an important intermediate in chemical synthesis and occurs naturally, most notably in the venom of bee and ant stings.
Corrosion behaviour of copper has been investigated in different compositions of formic acid and acetic acid at 30 C by a potentiostatic method. The maximum corrosion rate was found in 2040 mol/o formic acid and in 20 mol/o acetic acid in aqueous solution mixtures. The corrosion rate depended on the concentration of either acid. Formic acid is observed to be more corrosive than acetic acid. The metal exhibited active-passive behaviour in the concentration range of 3070 mol/o of HCOOH acid in the solution mixture. A short passivity range of potential with a high passivity current density was observed for the metal in the solution mixtures of HCOOH acid while in solution mixtures of acetic acid the metal exhibited only active dissolution.
The acetic acid and formic acid are fully
organic acids that come to use in the systems for the purpose of mild cleaning, de-rusting, ph adjustment and de-scaling of applications.
Application: Multiple applications for metal surface treatment, cleaning, descaling & derusting for various industries.
Specification:
Chemical Type: Blend of specialized chemical compounds
Form: Liquid
Specific Gravity: Ranges from 1.0 1.2 depending upon product
Ph: Product Specific
Solubility: Soluble in Water
Dosage: Dosage depends on product, application, acid type and concentration and operating temperature. The specific dosage rates and method will be specified by the Chemtex technical representative.
Major Benefits: Metal Protection Wetting properties for effective cleaning.
by: Monodeep Mukherjee
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