Electrochemical behavior of active surface layers in AA8xxx aluminum alloys

被引：0
|
作者：
Andreatta, Francesco [1 ]
Lanzutti, Alex [1 ]
Maschio, Stefano [1 ]
Fedrizzi, Lorenzo [1 ]
机构：
[1] Univ Udine, Polythecn Dept Engn & Architecture, Udine, Italy
来源：
SURFACE AND INTERFACE ANALYSIS | 2019年 / 51卷 / 12期
关键词：
AA8xxx; corrosion; finstock heat exchanger; HVAC&R; CLAD AA2024 ALUMINUM; IN SUBSURFACE LAYERS; AL-SN ALLOY; CORROSION BEHAVIOR; ANODIC ACTIVATION; FILIFORM CORROSION; AA8006; TIN; MICROSTRUCTURE; MECHANISM;
D O I：
10.1002/sia.6624
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
AA8xxx alloys employed in the HVAC&R sector (heating, ventilating, air conditioning, and refrigerating) were investigated to highlight the effect of active surface layers in heat-exchanger fins. The local behavior of the surface and the bulk of the alloy sheets was studied by means of an electrochemical microcell in combination with glow-discharge optical-emission spectrometry. Surface layers strongly enhance the electrochemical activity of the fin material. This is related to the segregation of Mg and other elements (Sn) strongly impairing the protective behavior of the oxide film generated during thermomechanical processing.
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收藏
页码：1240 / 1250
页数：11
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