湿度对土壤中微生物腐蚀作用的影响

中国腐蚀与防护学报

1984, Vol. 4

Issue (2): 134-142

研究报告

本期目录 | 过刊浏览

湿度对土壤中微生物腐蚀作用的影响

吕人豪;扈芝香

中国科学院微生物研究所;北京;中国科学院微生物研究所;北京

THE INFLUENCE OF MOISTURE ON MICROBIAL CORROSION OF MILD STEEL IN SOIL

Lu Renhao Wu Zhixiang(Institute of Microbiology; Acadimia Sinica; Beijing)

全文: PDF(802 KB)

摘要: 研究了不同湿度,不同接菌条件的同一土壤对钢的腐蚀作用。其结果是随着土壤湿度从6.5％上升到25％,土壤电阻,氧化还原电位,好气菌量递减,硫酸盐还原菌递增。钢的腐蚀失重随湿度提高而下降,接近饱和点(22％)后腐蚀率变化很小,腐蚀率变化临界点在湿度为18～20％之间。蚀坑深度在湿度为12～15％时最大,低于10％时次之,超过20％时最低。湿度在6.5～20％下是局部腐蚀,超过20％为均匀腐蚀。低湿度(6.5～16％)下,菌生长旺盛的比加杀菌剂抑制菌生长的土壤中,钢腐蚀失重高40～123％。文中对不同湿度土壤中钢的腐蚀原因进行了讨论。

Abstract：The corrosion behavior of mild steel in soil with various moisture and microbial condition has been investigated. The results showed that with increase in soil moisture from 6.5 to 25%, the weight loss of the steel due to corrosion as well as the soil resistivity, redox potential and count of aerobic bacteria decreased, while the count of sulfate-reducing bacteria markedly increased. When the moisture was near the saturation point, there was little change of corrosion rate, and the "critical soil moisture" for corrosion was at 18～20%. The maximum pit depths occured between 12% and 15% moisture, and the minimum at over 20%. At moisture content of 6.5～20%, corrosion was mostly localized, but over 20% general corrosion predominated, The weight loss of steel in soil with intensive activity of microbes was 40～123% higher than that in microbes inhibited soil at low moisture levels. The causes for steel corrosion under various soil moisture have been discussed.

收稿日期: 1984-04-25

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引用本文:

吕人豪;扈芝香. 湿度对土壤中微生物腐蚀作用的影响[J]. 中国腐蚀与防护学报, 1984, 4(2): 134-142.
. THE INFLUENCE OF MOISTURE ON MICROBIAL CORROSION OF MILD STEEL IN SOIL. J Chin Soc Corr Pro, 1984, 4(2): 134-142.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1984/V4/I2/134

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