The Influence of Different Gas Welding Flame on Corrosion Behavior of the Carbon Steel’s Heat Affected Zone in Seawater

Abstract:

The influence of different flame of gas welding on corrosion behavior of the carbon steel’s heat affected zone in seawater were studied by the weight-loss method, electroanalytical chemistry method and surface and microstructure observation. The result indicate that when gas welding the carbon steel, the corrosion rate of the heat affected zone under the influence of mild carbonizing flame is 0.1252[g／(m²•h)], in contrast, the corrosion rate of that under the influence of neutral flame is 0.1025[g／(m²•h)]; the order of corrosion current shows as follows: I_{mild carbonizing flame}>I_{neutral flame}>I_{base metal}; the order of measured corrosion potential as follows: E_{base metal}>E_{neutral flame}>E_{mild carbonizing flame}. Compared with the base metal, the heat effected zone are more likely to corrosion, corrosion resistance of the sample under mild carbon flame are the worse.

• Periodical: Advanced Materials Research (Volumes 1120-1121)
• Pages: 1059-1063
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.1059
• Online since: July 2015
• Authors: Cai Xiang Gu*, Guang Wei Liu, Yu Dong Xu
• Keywords: Carbon Steel, Gas Welding, Heat Affected Zone, Seawater Corrosion

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