A Study on Relationship Between Corrosion Resistance and Corrosion Potential of Stainless Steels in Seawater

J Chin Soc Corr Pro

2000, Vol. 20

Issue (1): 35-40 DOI:

Research Report

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A Study on Relationship Between Corrosion Resistance and Corrosion Potential of Stainless Steels in Seawater

Guiqiao Huang;;Wentai Hou

青岛海洋腐蚀研究所

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Abstract Corrosion potential of stainless steels immersed in seawater at four test sites in China for 180 days and corrosion data for 4 years were examined. Relationships between corrosion potential and seawater corrosion resistance of stainless steels were discussed.For stainless steels with high possivation tendency in seawater, their corrosion potential shifted toward positive with time, longer time was needed for the potential to become steady, and greater potential fluchuation was observed. The stainless steels with poor possivation tendency exhibited contrary results. Difference between steady potential of various stainless steels might be significant. At Qingdao, Zhoushan and Yulin, the variance of corrosion potential between 2Cr13 and HRS-3 reached over 0.8V. The order of steady corrosion resistance in seawater. Stainless steels with relatively positive steady potential were corrosion resistant and vice versa. Thus,corrosion resistance of stainless steels in seawater could be evaluated on the basis of corrosion potential measurements.

Key words: stainless steel seawater corrosion corrosion potential

Received: 01 February 1999

ZTFLH:

TG172.5

Corresponding Authors: Guiqiao Huang

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Guiqiao Huang; Wentai Hou. A Study on Relationship Between Corrosion Resistance and Corrosion Potential of Stainless Steels in Seawater. J Chin Soc Corr Pro, 2000, 20(1): 35-40 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2000/V20/I1/35

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