Grain boundary selective oxidation and intergranular stress corrosion crack growth of high-purity nickel binary alloys in high-temperature hydrogenated water

被引：50

作者：

Bruemmer, S. M. ^{[1
]}

Olszta, M. J. ^{[1
]}

Toloczko, M. B. ^{[1
]}

Schreiber, D. K. ^{[1
]}

机构：

[1] Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99354 USA

来源：

CORROSION SCIENCE | 2018年 / 131卷

关键词：

Nickel; Alloy; TEM; Intergranular corrosion; Stress corrosion; Selective oxidation; ATOM-PROBE TOMOGRAPHY; INTERNAL OXIDATION; ENVIRONMENTAL CRACKING; ELECTRON-MICROSCOPY; POURBAIX DIAGRAMS; CHROMIUM-ALLOYS; MECHANISM; SYSTEMS; CR; DIFFUSION;

D O I：

10.1016/j.corsci.2017.11.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of alloying elements in Ni-5at%X binary alloys on intergranular (IG) corrosion and stress corrosion cracking (SCC) have been assessed in 300-360 degrees C hydrogenated water at the Ni/NiO stability line. Alloys with Cr or Al additions exhibited grain boundary oxidation and IGSCC, while localized degradation was not observed for pure Ni, Ni-Cu or Ni-Fe alloys. Environment-enhanced crack growth was determined by comparing the response in water and N-2 gas. Results demonstrate that selective grain boundary oxidation of Cr and Al promoted IGSCC of these Ni alloys in hydrogenated water.

引用

页码：310 / 323

页数：14

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