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中文摘要：
通过实验室和现场条件下的埋片实验,并结合微观形貌分析和电化学极化技术,研究了X70钢在库尔勒土壤环境中的腐蚀行为。研究表明,X70钢在库尔勒土壤环境中能够生成较稳定的腐蚀产物膜,其局部腐蚀区域（新鲜金属表面）的腐蚀电流密度大大高于非局部腐蚀区的,表明X70钢在库尔勒土壤环境中容易发生局部腐蚀。这些局部腐蚀的特点是宏观上为不均匀腐蚀或大的点蚀,微观上发生明显的晶界腐蚀。
英文摘要：
Corrosion characteristic of X70 pipeline steel in a high saliferous and alkaline soil environment, named Ku＇erle soil,was investigated by burying tests both in lab and nature field,micro-morphology analyses and electrochemical polarization technique.The X70 pipeline steel would form a protective corrosion product film,leading to a relative low dissolution current,however,the anodic current in local corrosion area,or in fresh surface without film covering,is much more intensive than the usual metal surface covered with productive film,indicating that X70 pipeline steel is susceptible to local corrosion.The characteristic of these localizing corrosion is non-uniform corrosion and visible corrosion pits observed in a magnifying scale,and in a mode of intergranular corrosion under micro scale observation.
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