富营养化淡水中黑色金属试样腐蚀加速的微生物学机制研究

Microbiological Mechanisms for Accelerated Corrosion of Black Metals in Eutrophic Fresh Water

目的探究黑色金属在污染淡水中后期腐蚀加速规律的生物学机制。方法采用高通量测序分析A3钢在富营养化水体和清洁水体中腐蚀产物内微生物的种群结构,并结合元素分析和XPS分析。结果获得了A3钢的腐蚀产物内微生物的门水平物种分布柱状图、OTU估计数统计表、OTU韦恩图、硫酸盐还原菌各属的相对丰度、微生物属水平热图等数据。结论在富营养化水体中,硫酸盐还原菌呈现更显著的水平,造成金属的硫化腐蚀更为严重,验证了黑色金属在富营养化污染淡水水体中后期腐蚀速率反转加速的现象。

Objective To explore the biological mechanism for acceleration rules in later corrosion of black metal in polluted fresh water. Methods High-throughput sequencing was used for the first time to analyze the microbial community structure in the corrosion products of A3 steel in eutrophic and clean water, combining elements analysis and XPS analysis. Results Data on corrosion products of A3 steel were obtained, including the microbial species distribution histogram on gate level, statistical tables of OTU estimate number, OTU Wayne map, relative abundances for each genus of sulfate-reducing bacteria and microbial infraredimages on genus level. Conclusion Sulfate-reducing bacteria in corrosion products are more significant in eutrophic water, causing more serious metal sulfide corrosion. Finally, the phenomenon of reversed acceleration corrosion in later corrosion of black metal in polluted eutrophic fresh water is verified..