Role of alloy matrix and dispersoid on corrosion behavior of cast aluminum alloy composites

被引：20

作者：

Modi, OP ^{[1
]}

Saxena, M ^{[1
]}

Prasad, BK ^{[1
]}

Jha, AK ^{[1
]}

Das, S ^{[1
]}

Yegneswaran, AH ^{[1
]}

机构：

[1] Reg Res Lab, Bhopal 462026, India

来源：

CORROSION | 1998年 / 54卷 / 02期

关键词：

Al; 2014; aluminum; corrosion behavior; graphite; potentiodynamic testing; salt immersion testing; silicon carbide; sodium chloride; weight loss;

D O I：

10.5006/1.3284836

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Observations made during the corrosion of cast aluminum alloys dispersed with graphite/silicon carbide (SiC) particles were analyzed. Corrosion studies were carried out in 3 wt% sodium chloride (NaCl) solution using salt immersion and potentiodynamic techniques. Corresponding base alloys were subjected to identical test conditions to understand the influence of the dispersoid on corrosion behavior. In all cases, the composites exhibited higher corrosion loss over the respective matrix alloy. Weight loss increased with exposure time. The dispersoid/matrix and the precipitate/matrix interfaces were found to be favorable sites for nucleation of corrosion pits. Results were explained with the help of microstructural observations and electrochemical parameters.

引用

页码：129 / 134

页数：6

共 21 条

[1]

AUGUSTYNSKI J, 1978, PASSIVITY METALS, P973

[2]

Aylor D.M., 1987, METALS HDB, V13, P859

[3]

AYLOR DM, 1985, J ELECTROCHEM SOC, V132, P1271

[4] CORROSION BEHAVIOR OF SILICON-CARBIDE PARTICLE REINFORCED 6061/AL ALLOY COMPOSITES [J].