海水中小球藻对Q235碳钢腐蚀行为的影响
Effect of Chlorella Vulgaris on Corrosion Behavior of Q235 Carbon Steel in Seawater
摘 要
采用表面分析技术以及电化学测试技术研究了海水中小球藻对Q235碳钢腐蚀的影响。结果表明：在不含小球藻培养液中Q235碳钢发生均匀腐蚀，而在含小球藻培养液中碳钢发生不均匀腐蚀；在含小球藻体系中，开路电位随浸泡时间的变化呈周期振荡；小球藻及其代谢产物能够在材料表面附着并形成一层生物膜，减缓金属的腐蚀；小球藻光合作用产生的氧导致阴极氧去极化作用，加速了金属的腐蚀。
小球藻
腐蚀行为
Q235 carbon steel
chlorella vulgaris
corrosion behavior
Abstract
The effect of chlorella vulgaris in seawater on corrosion behavior of Q235 carbon steel was investigated by means of surface analysis techniques and electrochemical measurement method. The results show that the Q235 carbon steel uniformly corroded in culture medium without chlorella vulgaris, but localized corrosion occurred in culture medium with chlorella vulgaris. The open circuit potential showed a periodic oscillation with the change of immersion time in culture medium with chlorella vulgaris. The chlorella vulgaris and its metabolite could adhere to steel surface and form a biofilm which could effectively restrain metallic corrosion. Meanwhile, the oxygen produced by photosynthesis of chlorella vulgaris can cause cathodic oxygen depolarization reaction, which accelerated the corrosion of metal.
中图分类号 TG172 DOI 10.11973/fsyfh-201804001
所属栏目 试验研究
基金项目 国家自然科学基金项目（41376003；41006054）；中国科学院战略性先导科技专项（A类）（XDA13040405）
收稿日期 2016/11/21
修改稿日期
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引用该论文: ZHENG Chuanbo,HU Xiuhua,ZHANG Jie,DUAN Jizhou,QIAN Zhouhai,HOU Baorong. Effect of Chlorella Vulgaris on Corrosion Behavior of Q235 Carbon Steel in Seawater[J]. Corrosion & Protection, 2018, 39(4): 247
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【6】SAN N O,NAZIR H,DÖNMEZ G. Microbially influenced corrosion and inhibition of nickel-zinc and nickel-copper coatings by pseudomonas aeruginosa[J]. Corrosion Science,2014,79(2):177-183.
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【13】SEKAR R,VENUGOPALAN V P,SATPATHY K K,et al. Laboratory studies on adhesion of microalgae to hard substrates[M]. Berlin:Springer Netherlands,2004:109-116.
【14】IRVING T E,ALLEN D G. Species and material considerations in the formation and development of microalgal biofilms[J]. Applied Microbiology & Biotechnology,2011,92(2):283-94.
【15】GEESEY G G,JANG L,JOLLEY J G,et al. Binding of metal ions by extracellular polymers of biofilm bacteria[J]. Water Science & Technology,1988,20(11/12):161-165.
【16】GU J D,ROMAN M,ESSELMAN T,et al. The role of microbial biofilms in deterioration of space station candidate materials[J]. International Biodeterioration & Biodegradation,1998,41(1):25-33.
【17】DAHMS H U,DOBRETSOV S,QIAN P Y. The effect of bacterial and diatom biofilms on the settlement of the bryozoan Bugula neritina[J]. Journal of Experimental Marine Biology & Ecology,2004,313(1):191-209.
【18】ISHIHARA Y,TSUJIKAWA S. Effect of bacteria combined with diatom on ennoblement of electrode potential for stainless steels in natural sea water[J]. Corrosion Engineering,1999,48:520-527.
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