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Corrosion study on X70-carbon steel material influenced by soil engineering properties

机译:X70碳钢材料受土壤工程特性影响的腐蚀研究

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摘要

Soil as a corrosive medium is probably of greater complexity than other environment. This paper studies the influence of soil engineering properties towards metal loss of buried X70 carbon steel coupons. The study focuses on soil engineering properties which are soil moisture content, clay content and plasticity index. A total of 160 pieces of X70 carbon steel coupon were buried in 5 different locations in Peninsular Malaysia for a period of 12 months to study the effect of the abovementioned parameters towards metal loss caused by soil-corrosion. The samples were retrieved periodically for every 3 months to determine its weight loss and consequently the corrosion rate. It was found that the rapid growth of corrosion is relatively correlated with the high moisture content of soil. Yet, corrosion initiated at a slow pace for high plasticity soil and clayey soil. The highest and the lowest corrosion growth rate were calculated at 0.218mm/year and 0.051mm/year respectively. No strong indication can be found to relate the dominant influence of soil engineering properties towards measured corrosion rate of buried steel coupons.
机译:土壤作为腐蚀性介质可能比其他环境具有更大的复杂性。本文研究了土壤工程特性对埋藏的X70碳钢试样的金属损失的影响。该研究的重点是土壤工程特性,包括土壤水分,粘土含量和可塑性指数。总共160件X70碳钢试样块被埋在马来西亚半岛的5个不同位置,历时12个月,以研究上述参数对土壤腐蚀引起的金属损失的影响。每3个月定期取一次样品,以确定其重量损失,从而确定腐蚀速率。研究发现,腐蚀的快速发展与土壤的高水分含量相关。然而,对于高塑性土壤和黏性土壤,腐蚀起步较慢。最高和最低腐蚀增长率分别为0.218mm /年和0.051mm /年。没有明显的迹象表明土壤工程性质的主要影响与测得的埋入式钢样的腐蚀速率有关。

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