新型含Cu管线钢--提高管线耐微生物腐蚀性能的新途径

Novel Cu-Bearing Pipeline Steels: A New Strategy to Improve Resistance to Microbiologically Influenced Corrosion for Pipeline Steels

微生物腐蚀是造成管线材料破坏和失效并导致巨大经济损失的一个重要原因,发展具有耐微生物腐蚀性能的新型管线钢是从材料自身角度降低发生微生物腐蚀倾向的新途径,具有重要的科学意义和应用价值。在传统的管线钢化学成分基础上,通过适量的Cu合金化,在服役环境中发生的微量铜离子的持续释放会杀死细菌并抑制细菌生物膜形成,从而起到耐微生物腐蚀作用,这是提高管线钢耐微生物腐蚀性能的主要创新思想。本文通过总结当前管线钢的微生物腐蚀及其研究现状,提出了一种从材料角度防治微生物腐蚀的新方法。介绍了新型含Cu管线钢在合金设计、组织结构、力学性能、抗氢致开裂性能和耐微生物腐蚀性能方面的研究进展,重点介绍了含Cu管线钢在实验室条件下的耐微生物腐蚀性能研究结果,最后展望了新型含Cu管线钢的未来发展趋势。

Microbiologically influenced corrosion(MIC) has been an important reason leading to the damage and failure of pipeline steels, bringing a great economic loss. Development of MIC resistant pipeline steel is a new strategy to mitigate MIC from the aspect of material itself, having important scientific significance and application value. By proper Cu alloying design to the traditional pipeline steels, aiming at continuous release of Cu ions to kill the bacteria and inhibit the formation of bacterial biofilm, a creative strategy for improving the MIC resistance of pipeline steels has been proposed. This article briefly introduces the MIC of pipeline steel and its research status, and then the research progress on alloy design,microstructure, mechanical properties, hydrogen induced cracking resistance and MIC resistance of novel Cu-bearing pipeline steels are reviewed, and the research results on MIC resistance of the novel Cubearing pipeline steels under the laboratory conditions are stressed, and finally the future tendency on research and development of this type of novel steels is suggested.