Some organic and inorganic compounds as inhibitors for carbon steel corrosion in 3.5 percent NaCl solution

Abstract

Purpose -To study the effects of the sodium salts of molybdate, tungstate and monovanadate as well as some derivatives of Neville-Winter acid azo dyes on the corrosion of carbon steel in 3.5 percent NaCl solution. Design/methodology/approach -Open circuit potential measurement and potentiostatic polarization techniques have been used. Findings -It was found that all the compounds had inhibition effects on carbon steel dissolution. Inhibition efficiency (IE) increased with increase in inhibitor concentration. The process of inhibition was attributed to the formation of an adsorbed film on the metal surface, which protects the metal against the corrosive medium. The adsorption of these compounds on the steel/chloride interface was found to follow Freundlich adsorption isotherm behaviour. Originality/value -Proves the effectiveness of the sodium salts of molybdate, tungstate and monovanadate as well as some derivatives of Neville-Winter acid azo dyes on the corrosion of carbon steel in 3.5 percent NaCl solution.

Corrosion Performance of Stainless Steel and Nickel Alloys in Aqueous Sodium Hydroxide as Revealed from Cyclic Voltammetry and Potentiodynamic Anodic Polarization

“…The formation and development of this type of attack on the metal surface can occur only in solutions containing the aggressive Cl -, Br -and I -ions [4][5][6][7][8][9][10][11][12] . The critical potential at which pitting initiates is reported by several authors and found to depend on a number of factors including the type and concentration of attacking anion, type of metal used and relative concentration of other anions [13][14] .…”

Corrosion inhibition of AISI 1020 steel based on tungstate anion and amoxicillin as corrosion inhibitors in 0.05 mol l−1NaCl solution or inserted into cellulose acetate films

“…There are a variety of methods for protection against the corrosion of ferrous alloys, based on the use of corrosion inhibitors or coatings …”

Electrobioremediation of Patagonian Soils Contaminated with Hydrocarbons

“…2 (10) where E a represents the apparent activation energy, R the gas constant, T the temperature, A the pre-exponential factor, and W is the corrosion rate. The values of E a can be obtained from the slope of the straight lines and are listed in Table 4.…”

“…The use of inhibitors is one of the most practical methods for protection against corrosion especially in acid solutions to prevent metal dissolution and acid consumption [1]. Most well known acid inhibitors for steel corrosion are organic compounds containing [2][3][4][5][6][7][8][9][10]. It has been observed that most of the organic inhibitors act by adsorption on the metal surface [11].…”