Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《中国腐蚀与防护学报》
Abstract： The effect of sulfate reducing bacteria (SRB) on stress corrosion cracking (SCC) behavior of X100 pipeline steel was investigated in artificial solution, which simulated the acid soil medium in the area of Yingtan at the Southeast China by means of slow strain rate test (SSRT) and scanning electron microscope (SEM). The results show that X100 pipeline steel has higher SCC susceptibility in the sterile artificial solution than that with SRB. The failure mode is transgranular cracking in both the two solutions. These results suggest that SRB inhibits the brittleness and reduces the SCC susceptibility of X100 pipeline steel, which may be ascribed to that SRB can breed rapidly and form a compact biofilm on X100 pipeline steel surface, then partly block the migration of corrosive Cl- onto the X100 steel surface.
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