Effect of Inclusion on Pitting Corrosion of X80 Pipeline Steel

Feng Jun Lang; Xian Qiu Huang; Tao Pang; Ying Ma; Peng Cheng; Rui He

doi:10.4028/www.scientific.net/AMR.1120-1121.999

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1120-1121Effect of Inclusion on Pitting Corrosion of X80...

Effect of Inclusion on Pitting Corrosion of X80 Pipeline Steel

Abstract:

The influence of inclusion on pitting corrosion of X80 pipeline steel was investigated by using electrochemical test and atomic force microscope. The results indicated that corrosion potential of X80 pipeline steel sample with higher grade inclusion was lower, and decreased significantly with chloride ion concentration increasing. Inclusion was not conducive to corrosion resistance of X80 pipeline steel. The way of X80 pipeline steel pitting corrosion was that pit formed at the inclusion dissolution, and grew to pitting. There were less corrosion products near the pit hole, forming a cathode ring.