Microbiologically induced cable bolt corrosion in underground coal mines

Published on Oct 23, 2019
· DOI :10.36487/ACG_REP/1925_30_CHEN
Honghao Chen6
Estimated H-index: 6
,
Önder Kimyon10
Estimated H-index: 10
+ 6 AuthorsChristina Morris12
Estimated H-index: 12
Sources
Abstract
Corrosion failure is one of the serious concerns with most metal products. In the mining industry, corrosion failure of cable bolts may threaten the safety of operations and cause significant financial losses. In recent years, many cable bolt failures have been reported from several underground coal mines in Australia. Recent studies have shown that the localised environment around the cable bolts (oxygen level, groundwater, bacteria, etc.) has a significant impact on the corrosion behaviour; however, studies on the role of bacteria in the corrosion of underground support systems are still limited. This paper reports on a study of the role of a well-known bacterium in microbiologically induced corrosion of cable bolts. Acidithiobacillus ferrooxidans is found in many underground mines. The cable bolt specimens used in the study were specially designed to simulate the stress level experienced in the in situ mine condition. The specimens were analysed based on their weight loss and morphological features at the end of the study. The results indicated that the involvement of the bacteria in localised corrosion development and biofilm formation on the metal surface was a contributing factor in accelerating the corrosion of the bolt and could lead to catastrophic failure of the bolts in the long term.
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References7
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#1Saisai Wu (UNSW: University of New South Wales)H-Index: 7
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Abstract Stress corrosion cracking (SCC) of cable bolts in underground mines is a universal issue with limited cost effective solutions at present. Understanding the SCC mechanism of cable bolt failure is crucial in maintaining effective ground support and hence increasing the safety and productivity of underground mines. However, to date, no practical laboratory system has been developed to replicate the SCC mechanism which occurs in underground mines. In this study, based on the chemical prope...
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#1Hua Wang (University of Akron)H-Index: 10
#2Lu-Kwang Ju (University of Akron)H-Index: 32
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Abstract In this study, corrosion behaviors of carbon steel C1010 in the presence of an acidophilic, iron-oxidizing bacterial species Acidithiobacillus ferrooxidans were examined. Results showed that A. ferrooxidans cells, with or without attaching to C1010 steel, accelerated its corrosion at a rate of 3–6× those of acidic water, at a pH of 2, without cells. A. ferrooxidans oxidized Fe2+ to Fe3+ as an energy source and the produced Fe3+ rapidly oxidized Fe0 to Fe2+ was proposed and verified as t...
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#1Masoumeh Moradi (CAS: Chinese Academy of Sciences)H-Index: 9
#2Jizhou Duan (CAS: Chinese Academy of Sciences)H-Index: 18
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The corrosion behavior of 316 stainless steel was investigated in the presence of a mixture of metal-oxidizing bacteria isolated from marine environments. Ennoblement of stainless steel in the presence of these bacteria can lead to localized corrosion that confirmed by ESEM images. The corrosion rate of the metals also increased. EDS results showed that these bacteria caused the segregation of Si elements in the metal structure and promoted the depletion of Cr and Fe contents in the corrosion pr...
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Abstract By adding a small amount of the amino acid cysteine to an acidic solution containing Thiobacillus ferroxidans cells and subsequent incubation with synthetic pyrite layers, the duration of the lag phase in the growth of T. ferrooxidans is minimized and the leaching rate of this sulfide is increased three times compared to the normal process without this biochemical additive. In the presence of cysteine, pyrite can be oxidized in the absence of bacteria with a leaching rate comparable wit...
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Eight strains of Thiobacillus ferrooxidans (laboratory strains Tf-1 [= ATCC 13661] and Tf-2 [= ATCC 19859] and mine isolates SM-1, SM-2, SM-3, SM-4, SM-5, and SM-8) and three strains of Thiobacillus thiooxidans (laboratory strain Tt [= ATCC 8085] and mine isolates SM-6 and SM-7) were grown on ferrous iron (Fe2+), elemental sulfur (S0), or sulfide ore (Fe, Cu, and Zn). The cells were studied for their aerobic Fe2+ - and S0-oxidizing activities (O2 consumption) and anaerobic S0-oxidizing activity ...
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Last. Serkan Saydam (UNSW: University of New South Wales)H-Index: 15
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Abstract Reports on corrosion failure of cable bolts, used in mining and civil industries, have been increasing in the past two decades. The previous studies found that pitting corrosion on the surface of a cable bolt can initiate premature failure of the bolt. In this study, the role of Acidithiobacillus ferrooxidans (A. ferrooxidans) bacterium in the occurrence of pitting corrosion in cable bolts was studied. Stressed coupons, made from the wires of cable bolts, were immersed in testing bottle...
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