Role of hydrogen promoters on corrosion and hydrogenation of mild steel in aqueous and methanolic hydrochloric acid solutions

Journal Article · Sat Jul 01 00:00:00 EDT 1995 · Corrosion

DOI:https://doi.org/10.5006/1.3294374· OSTI ID:89615

Paty, B B ^[1]; Singh, D D.N. ^[2]; Das, C R

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1. B.J.B. Coll., Bhubaneswar (India). Dept. of Chemistry
2. National Metallurgical Lab., Jamshedpur (India)

Corrosion and hydrogenation of mild steel (MS) in aqueous and methanolic solutions of hydrochloric acid (HCl) were studied using weight loss, electrochemical, and hydrogen estimation methods. The effects of some hydrogen-promoting species such as cathodic poisons (i.e., sodium arsenite (NaAsO{sub 2}), selenium dioxide (SeO{sub 2}), stannous chloride (SnCl{sub 2}), and mercuric chloride (HgCl{sub 2})) were investigated to understand their role on the dissolution and hydrogen absorption characteristics of MS in aqueous and methanolic HCl solutions. The dissolution rate of MS in methanolic solution of HCl was considerably higher than in the aqueous HCl solution, where as the hydrogen pickup values of the steel in methanolic solution were less than in the aqueous HCl solution. Addition of NaAsO{sub 2} lowered the dissolution rate and hydrogen pickup values in both solutions. The other poisons had specific effects on the dissolution rate and hydrogen pickup values.

• Sponsoring Organization: USDOE
• OSTI ID: 89615
• Journal Information: Corrosion, Vol. 51, Issue 7; Other Information: PBD: Jul 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STEELS
HYDRIDATION
CORROSION
ARSENIC OXIDES
CATALYTIC EFFECTS
SELENIUM OXIDES
TIN CHLORIDES
MERCURY CHLORIDES
SODIUM COMPOUNDS
PROMOTERS
AQUEOUS SOLUTIONS
ORGANIC SOLVENTS