期刊
CORROSION SCIENCE
卷 111, 期 -, 页码 391-403出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2016.05.032
关键词
Low alloy steel; Polarization; Weight loss; Welding
资金
- Nature Science Foundation Project of China [51371034]
The corrosion behavior of a semi-automatic gas tungsten arc welded joint in 3Cr steel was investigated in a CO2-containing environment. Assessment of the galvanic corrosion interactions of the different regions in the joint was carried out through microelectrochemical measurements and immersion tests. The weld zone (WZ) was determined to be the most cathodic region while the base metal (BM) was the most anodic region. The heat affected zone (HAZ) underwent little galvanic interaction, as its free potential was close to the coupled potential. The galvanic coupling effects theoretically derived from the corrosion current densities before and after coupling were in good agreement with the results of the immersion tests. (C) 2016 Elsevier Ltd. All rights reserved.
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