Hydrogen entry into pipeline steel under freely corroding conditions in two corroding media

被引：39

作者：

Dey, S. ^{[1
]}

Mandhyan, A. K. ^{[1
]}

Sondhi, S. K. ^{[1
]}

Chattoraj, I. ^{[1
]}

机构：

[1] Natl Met Lab, Jamshedpur 831007, Bihar, India

来源：

CORROSION SCIENCE | 2006年 / 48卷 / 09期

关键词：

hydrogen permeation; pipeline; diffusivity; corrosion product; hydrogen concentration;

D O I：

10.1016/j.corsci.2005.10.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hydrogen permeation through API 5L X65 pipeline steel was studied under freely corroding conditions in NACE solution (simulated seawater) and poisoned 1 N H2SO4. A steady state condition with regards to permeation flux is not obtained due to the presence of corrosion product, changing sample dimension and a possible change in hydrogen availability on the corroding surface. A unique way of calculating the sub-surface hydrogen concentration (CO) under non-steady state freely corroding conditions has been developed. The C-0 has been evaluated as a function of exposure time in NACE solution and poisoned H2SO4 solution. The sub-surface hydrogen concentration (CO) increased initially but then decreased with increasing exposure to the corroding solutions, after demonstrating an early maximum. The changes in C-0 have been explained taking into consideration the corrosion products that developed, the possible anodic reactions, the changes in sample thickness and other issues in the dynamic system. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：2676 / 2688

页数：13

共 12 条

[1]

*ASTM, 14897 ASTM, P624

[2] ANODIC IRON-OXIDE FILMS AND THEIR EFFECT ON THE HYDROGEN PERMEATION THROUGH STEEL [J].