Influence of sodium salts of organic acids as additives on localized corrosion of aluminum and its alloys

Journal Article · Fri Oct 01 00:00:00 EDT 1993 · Corrosion (Houston); (United States)

DOI:https://doi.org/10.5006/1.3316005· OSTI ID:5728320

Raspini, I A ^[1]

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1. Comision Nacional de Energia Atomica, Buenos Aires (Argentina)

Localized pitting is best described by a characteristic parameter called the pitting potential values (E[sub p]). Although E[sub p] is governed by a number of factors, including alloy composition, metallurgical history, and the corrosive environment, the strongest effect on E[sub p] is produced by certain additives that differ from the aggressive anion and exert a beneficial effect. These are referred to as inhibitors. Potentiokinetic and potentiostatic anodic polarization curves were obtained on aluminum (Al) and Al alloys in mixed solutions containing sodium chloride with sodium benzoate, sodium acetate, or thioglycolic acid as inhibitors. Immersion time at the rest potential and corrosion products accumulated in the pits influenced the inhibition efficiency. Reliability of the polarization method was discussed.

• OSTI ID: 5728320
• Journal Information: Corrosion (Houston); (United States), Vol. 49:10; ISSN 0010-9312
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
PITTING CORROSION
ALUMINIUM ALLOYS
SODIUM COMPOUNDS
CORROSION RESISTANCE
BENZOIC ACID
CORROSION INHIBITORS
GLYCOLIC ACID
SALTS
SODIUM CHLORIDES
ALKALI METAL COMPOUNDS
ALLOYS
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CORROSION
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HYDROXY ACIDS
METALS
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
360105* - Metals & Alloys- Corrosion & Erosion