The structure and high temperature corrosion performance of medium-thickness aluminide coatings on nickel-based superalloy GTD-111

被引：47

作者：

Firouzi, A. ^{[2
]}

Shirvani, K. ^{[1
]}

机构：

[1] IROST, Inst Adv Technol, Dept Adv Mat & New Energies, Tehran 158153538, Iran

[2] Islamic Azad Univ, Karaj Branch, Dept Met Engn, Tehran, Iran

来源：

CORROSION SCIENCE | 2010年 / 52卷 / 11期

关键词：

Hot corrosion; Oxidation; Superalloys; HOT CORROSION; CYCLIC OXIDATION; SILICON; RESISTANCE; ADDITIONS; IN-738LC; BEHAVIOR; ALLOYS;

D O I：

10.1016/j.corsci.2010.06.026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Simple and Si-modified aluminide coatings having medium-thickness (40-60 mu m) have been applied on the superalloy GTD-111 by a slurry technique. Hot corrosion and cyclic oxidation performance of the uncoated and the coated superalloy were investigated by exposing samples to a molten film of Na2SO4-40 %wt NaVO3-10%wt NaCl at 780 degrees C and 1 h cyclic oxidation at 1100 degrees C in air, respectively. The presence of silicon in the aluminide structure increased the oxidation resistance by a factor of 1.7 times. In addition, a SiO2-containing scale, which formed on the Si-containing coating surface, was stable during of the hot corrosion testing. (C) 2010 Published by Elsevier Ltd.

引用

页码：3579 / 3585

页数：7

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