霉菌对超高强钢腐蚀行为的影响  

Effect of mold on corrosion behavior of ultra high strength steels

作　　者：李慧艳[1] 董超芳[1,2] 邹士文[1] 肖葵[1,2] 李晓刚[1,2] 钟平[3] 

机构地区：[1]北京科技大学腐蚀与防护中心,北京100083 [2]腐蚀与防护教育部重点实验室,北京100083 [3]北京航空材料研究院,北京100095

出　　处：《北京科技大学学报》2013年第6期753-762,共10页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(51171023);中央高校基本科研业务费专项(FRF-TP-11-006B)

摘　　要：采用扫描Kelvin探针测试技术,研究了300M钢、Aermet100钢与超高强不锈钢在黄曲霉、黑曲霉、球毛壳霉、绳状青霉和杂色曲霉组成的混合霉菌菌种作用下的腐蚀行为.通过扫描电镜结合能谱分析对霉菌在三种超高强钢上的生长进行了观察和分析.300M钢试样上霉菌呈现分散式堆积生长,数量逐渐增加;Aermet100钢试样上霉菌呈现分散式单个生长方式,数量逐渐增加;超高强不锈钢上霉菌呈现放射式网状生长方式,数量急剧增加,在钢表面形成一层生物膜.霉菌实验后,三种超高强钢表面都发生一定的腐蚀.300M钢腐蚀最严重,蚀坑宽而浅;Aermet100钢次之,蚀坑窄而深;超高强不锈钢的耐蚀性最好.扫描Kelvin探针测试结果表明,霉菌一定程度上能促进300M钢和Aermet100钢的腐蚀,而对超高强度不锈钢的腐蚀行为有一定抑制作用.The corrosion behavior of 300M steel, Aermetl00 steel, and ultra high strength stainless steel was investigated in the mold environment, including Aspergillus flavus, Aspergillus niger, Chaetomium globosum, Penicillium funiculosum, and Aspergillus versicolor, by scanning Kelvin probe （SKP） measurements. The growth of the mold was observed by scanning electron microscopy （SEM） and was analyzed by energy dispersive X-ray spectroscopy （EDS）. The mold presents individual and cumulate growth on the specimen surface of 300M steel and the amount increases gradually, it grow individually and dispersively on the specimen surface of Aermetl00 steel and the amount increases gradually, but it shows radial and netty growth on the specimen surface of ultra high strength stainless steel and the amount increases greatly, which results in a microbial film. Some corrosion appears on the surface of all the three steel specimens after mold test. 300M steel presents the severest corrosion with wide and shallow pits, Aermetl00 steel is the next with narrow and deep pits, and corrosion resistance for ultra high strength stainless steel is the best. SKP measurements show that the mold can facilitate the corrosion process for 300M steel and Aermetl00 steel but inhibit it for ultra high strength stainless steel in some degree.

关 键 词：高强钢 马氏体钢 不锈钢 钢腐蚀 微生物 耐蚀性 

分 类 号：TG172.3[金属学及工艺—金属表面处理]