A difference-imaging technique used to study streaking corrosion of aluminum alloys AA7075 and AA8006 in chloride solution

作者：Huang, RS; Lin, CJ; Isaacs, HS^*

来源：Electrochemical and Solid-State Letters, 2006, 9(2): B11-B14.

DOI：10.1149/1.2140503

• FILIFORM CORROSION
• HEAT-TREATMENT
• BEHAVIOR
• AA3005
• SHEET

We observed corrosion forming streaks in chloride solutions along abrasion grooves, or grooves formed during rolling, using an in situ difference-imaging technique. Streaking occurred on an abraded zinc-containing alloy AA7075-T6, and also on as-received or abraded and heat-treated alloy AA8006, which is representative of alloys known to suffer filiform corrosion. In both alloys, streaking was due to a 50 nm susceptible surface layer. This similarity contrasted with marked differences in how susceptibility developed, i.e., by abrasion in Al-Zn, and thermomechanical treatments in alloys prone to filiform corrosion. Mechanisms are discussed for streaking based on pH changes around growing streaks.

• 出版日期2006
• 单位厦门大学