Effect of sulfate ions on corrosion inhibition of AA 7075 aluminum alloy in sodium chloride solutions

Journal Article · Wed Mar 01 00:00:00 EST 1995 · Corrosion

DOI:https://doi.org/10.5006/1.3294360· OSTI ID:28021

Wu, T I ^[1]; Wu, J K ^[2]

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1. Tatung Inst. of Tech., Taipei (Taiwan, Province of China). Dept. of Materials Engineering
2. National Taiwan Ocean Univ., Keelung (Taiwan, Province of China). Inst. of Marine Materials Engineering

The effect of the addition of sulfate ions on corrosion inhibition of Aluminum Association (AA) 7075 aluminum (Al) alloy (UNS A97075) in aqueous solution was studied. Corrosion behavior was affected significantly by the addition of SO{sub 4}{sup 2{minus}}. The corrosion morphology and corrosion rate changed with various thermomechanical treatment sand with the relative amount of sodium sulfate and sodium chloride in the immersion test solutions. However, the inhibitive effect of SO{sub 4}{sup 2{minus}} was evident with the increasing relative amount of Na{sub 2}SO{sub 4}. Corrosion data and morphologies obtained were illustrated by a competitive anion adsorption mechanism.

• Sponsoring Organization: USDOE
• OSTI ID: 28021
• Journal Information: Corrosion, Vol. 51, Issue 3; Other Information: PBD: Mar 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
CORROSION
CORROSION INHIBITORS
PERFORMANCE TESTING
SODIUM SULFATES
SODIUM CHLORIDES
CORROSIVE EFFECTS
CORROSION PRODUCTS
MORPHOLOGY