A STUDY ON COMPOSITE COATINGS OF YTTRIUM ION-PLATING AND PACK ALUMINIZING FOR HIGH-TEMPERATURE APPLICATIONS

被引：13

作者：

KIM, KY ^{[1
]}

JUN, JH ^{[1
]}

JUNG, HG ^{[1
]}

机构：

[1] RES INST IND SCI & TECHNOL,POHANG 790600,SOUTH KOREA

来源：

OXIDATION OF METALS | 1993年 / 40卷 / 3-4期

关键词：

COMPOSITE COATING; PACK ALUMINIZING; ION PLATING; HOT CORROSION; IN; 713C;

D O I：

10.1007/BF00664496

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Yttrium (Y) was incorporated by an ion-plating method either before or after pack aluminizing to maximize the corrosion resistance of IN 713C. Various combinations of pack aluminizing and yttrium -ion plating were examined with respect to coating sequence, aluminum activity, and corrosive environment. Of all the various coating combinations examined, the best corrosion resistance was obtained from H/A + Y (high-activity aluminizing + Y-ion plating) type composite coatings. Uniformity of the Y deposition was greatly dependent upon the surface condition of the aluminide-coating layer. The high-activity aluminide coating gave better uniformity of Y deposition than did the low-activity-aluminide coating. Improvement of corrosion resistance by the Y-modified-aluminide composite coatings of H/A + Y type occur because the presence of Y between the Al2O3 columns improves Al2O3 scale adherence and substantially prevents depletion of Al in the aluminide-coating layer.

引用

页码：321 / 335

页数：15

共 12 条

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