Anodic Behaviour of Mild Steel in Deaerated Carboxylic Acid Solutions containing NO₂⁻, Cl⁻and NO₃⁻Ions

Treatment Tank Corrosion Studies for the Enhanced Chemical Cleaning Process

“…August 2011 Revision 1 6 of 112 Earlier references inferred from the test results that the anodic reaction was simply iron being corroded to form ferrous ion [11][12][13][14][15][16][17]. It was theorized that passivation occurred as a result of deposition of ferrous oxalate near the metal surface that had become supersaturated with ferrous ions.…”

Hydrogen Generation During the Corrosion of Carbon Steel in Oxalic Acid

“…Equation (12) is the sum of the anodic (equation (2)) and cathodic (equation (11) (12) Thus even the more recent studies would confirm that the ratio of hydrogen evolved to iron corroded would be 1:1.…”

“…These reactions could occur by themselves or occur simultaneously. Electrochemical laboratory tests have been utilized to determine the anodic reaction mechanism [4][5][6][7][8][9][10][11][12]. The details of the conditions of these tests and supporting results will be described in section 4.…”

“…The details of the conditions of these tests and supporting results will be described in section 4. Earlier references inferred from the test results that the anodic reaction was simply iron corroding to form ferrous ion [5,[7][8][9][10][11][12]. However, the more recent electrochemical tests [4,7] indicate that the hydro-oxalate species also participates in the corrosion reaction as shown in Equation (9) along with the iron oxidation reaction in Equation (1).…”

“…The first sections examine the electrochemical tests that were performed to investigate the anodic reaction [4][5][6][7][8][9][10][11][12]. The final section looks at the experimental work that was intended to measure the hydrogen evolved during corrosion of carbon steel in 8 wt.% oxalic acid.…”