Quantitative comparison of anaerobic pitting patterns and damage risks by chloride versus Desulfovibrio vulgaris using a fast pitting-characterization method

被引：8
作者：
Chen, Yajie [1 ]
Torres, Johanna [1 ,2 ]
Castaneda, Homero [1 ,3 ]
Ju, Lu-Kwang [1 ]
机构：
[1] Univ Akron, Dept Chem & Biomol Engn, Akron, OH 44325 USA
[2] Instrumentos & Controles SA, Bogota 11311, Cundinamarca, Colombia
[3] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX USA
来源：
INTERNATIONAL BIODETERIORATION & BIODEGRADATION | 2016年 / 109卷
关键词：
Carbon steel; Pitting corrosion; Microbiologically influenced corrosion; Infinite focus microscope; Sulfate reducing bacteria; Chloride; Surface roughness; SULFATE-REDUCING BACTERIA; MICROBIOLOGICALLY INFLUENCED CORROSION; FRESH-WATER STRAIN; CARBON-STEEL; STAINLESS-STEEL; MILD-STEEL; SURFACE-ROUGHNESS; IRON; MECHANISM; DEPTH;
D O I：
10.1016/j.ibiod.2016.01.012
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
Anaerobic carbon steel corrosion induced by chloride and a sulfate reducing bacterium (SRB) Desulfovibrio vulgaris was compared using a fast pitting-characterization method based on Infinite Focus Microscopy. This method was found to be significantly less labor-intensive and more reproducible for determination of maximum and average pit depths and pitted area percentage than manual pit identification and measurement. Graphic diagrams were developed with these parameters to show pitting patterns and compare damage risks. Results showed that this SRB was more damaging than chloride by forming deep pit clusters with larger maximum pit depths. Pit geometry and size were also compared for the two corrosion causes. The fast pitting-characterization method was validated to work well for corrosion with different pitting patterns and pit geometries induced by the chloride and D. vulgaris systems. (C) 2016 Elsevier Ltd. All rights reserved.
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页码：119 / 131
页数：13
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