CORROSION BEHAVIOR OF Cu AND Al IN WESTERN INLAND SALTY SOIL

J Chin Soc Corr Pro

2005, Vol. 25

Issue (5): 303-306 DOI:

Research Report

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CORROSION BEHAVIOR OF Cu AND Al IN WESTERN INLAND SALTY SOIL

Yonghong Wang;Zhonghui Lu;Yingzhi Li

电信科学技术第五研究所

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Abstract By means of naturally burying specimens in soil,corrosion behavior of cable metal materials such as Cu and Al in west China inland salty soil in Kelamayi,Kuerle,Yumen and Geermu for 1 year was studied.The results showed that Cu and Al were both spot-corroded in part.High content of Cl- and SO2-4 (10.863%,0.4795%) and relatively high water content (16.68%) in pickled soil in Geermu caused bad corrosion of Cu and Al.Thereinto,the average corrosion rate of Cu was 1.1884g/dm2·a,and the pitting depth of Al was 0.74mm/a.In the inhomogeneous brown desert soil in Kelamayi,the cuspate gravel whose content was high to 51% came into contact with the Al tube tightly,which formed an oxygen-thickness-difference cell to make the Al perforate within 1 year.The pi tting depth of Al was 1.5mm/a.It was concluded that besides soil nature and the content of Cl- and SO2-4 in soil,soil edaphon was also the dominating corrosion factor.

Key words: Cu Al soil corrosion

Received: 15 April 2004

ZTFLH:

TG172.4

Corresponding Authors: Yonghong Wang

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Yonghong Wang; Zhonghui Lu; Yingzhi Li. CORROSION BEHAVIOR OF Cu AND Al IN WESTERN INLAND SALTY SOIL. J Chin Soc Corr Pro, 2005, 25(5): 303-306 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2005/V25/I5/303

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