胥聪敏,罗金恒,周勇,曹伟峰,杨东平

• 1:西安石油大学材料科学与工程学院
• 2:中国石油集团石油管工程技术研究院

摘要(Abstract)：

采用慢应变速率拉神(SSRT)实验和SEM研究了SRB对X100管线钢在典型的西北盐渍土壤(库尔勒土壤模拟溶液)中应力腐蚀开裂行为的影响。结果表明,X100管线钢母材和焊缝在无菌的库尔勒土壤模拟溶液中具有较高的SCC敏感性,其断口模式为穿晶+沿晶SCC混合断裂;X100管线钢母材和焊缝在含有SRB的库尔勒土壤模拟溶液中的SCC敏感性低于无菌时的,其断口模式为穿晶SCC断裂,说明SRB的存在抑制了X100管线钢的脆变,致使X100管线钢的SCC敏感性降低,这可能是由于SRB能在X100管线钢表面快速繁殖并形成生物膜,该生物膜随时间的增加会不断的堆积并变得致密,一定程度上阻隔了活性阴离子Cl-进入X100管线钢基体表面,致使X100管线钢的SCC敏感性减小。

关键词(KeyWords)： X100管线钢;应力腐蚀开裂;硫酸盐还原菌;盐渍土壤

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51271146);; 陕西省能源化工过程强化重点实验室资助项目(SXECPI201503);; 陕西省重点学科专项资金(YS37020203);; 陕西省自然科学基金(206JQ5068)

作者(Author): 胥聪敏,罗金恒,周勇,曹伟峰,杨东平

DOI: 10.13289/j.issn.1009-6264.2016.05.015

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