LOCALIZED CORROSION INDUCED IN GRAPHITE ALUMINUM METAL-MATRIX COMPOSITES BY RESIDUAL MICROSTRUCTURAL CHLORIDE

被引：21

作者：

HIHARA, LH ^{[1
]}

LATANSION, RM ^{[1
]}

机构：

[1] MIT,HH UHLIG CORROS LAB,DEPT MAT SCI & ENGN,CAMBRIDGE,MA 02139

来源：

CORROSION | 1991年 / 47卷 / 05期

关键词：

ALUMINUM; CHLORIDE; GRAPHITE; LOCALIZED CORROSION; METAL-MATRIX COMPOSITE;

D O I：

10.5006/1.3585262

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Graphite fiber/aluminum (G/A) metal-matrix composites (MMCs) manufactured using the titanium-boron vapor deposit (Ti-B VD) method were found susceptible to localized corrosion in chloride-free sodium sulfate solutions in which Al should be passive. G/Al MMC precursor wires and plates made of diffusion-bonded packs of precursor wires were investigated in this study. When G/Al MMC plates were exposed to chloride-free sodium sulfate solutions, pitting regimes were visible in the anodic polarization diagrams. Accordingly, wire-wire diffusion bonds were severely pitted, causing disbonding of precursor wires that led to the exfoliation of plates. The pitting was was found to be caused by residual microstructural chloride originating from the Ti-B VD method. This work suggests that the exfoliation of G/Al MMC plates could be prevented by producing composites with halide-free microstructures.

引用

页码：335 / 340

页数：6

共 8 条

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[5]

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HIHARA, LH ;

LATANISION, RM .

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