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Performance and mechanism of a water stabiliser for low hardness cooling water

Zhou Baiqing (Zhou Baiqing is based at the Applied Chemistry Department, Wuhan University, Wuhan, Hubei, People's Republic of China)
Wang Xiaowei (Wang Xiaowei is based at the Applied Chemistry Department, Wuhan University, Wuhan, Hubei, People's Republic of China)
Li Qin (Li Qin is based at the Applied Chemistry Department, Wuhan University, Wuhan, Hubei, People's Republic of China)
Peng Yisheng (Peng Yisheng is based at the Maoming Thermal Power Plant, Maoming, Guangdong, People's Republic of China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 1 October 2003

354

Abstract

Corrosion of carbon steel and copper is a troublesome problem in low hardness cooling water systems. A new kind of water stabiliser containing hydroxy phosphonocarboxylic acid, zinc salts and molybdate has been developed. Its performance has been proved by means of weight loss tests and a static state scale‐inhibiting test method. The mechanism was also studied using polarisation tests, scanning electron microscope examination and XPS analysis. The test results showed that the corrosion rate of carbon steel and copper could be reduced to 0.0136 and 0.0010 mm/a, respectively. A compact film containing P, Mo and Zn was formed on the surface of carbon steel, by means of which the steel was protected.

Keywords

Citation

Baiqing, Z., Xiaowei, W., Qin, L. and Yisheng, P. (2003), "Performance and mechanism of a water stabiliser for low hardness cooling water", Anti-Corrosion Methods and Materials, Vol. 50 No. 5, pp. 347-351. https://doi.org/10.1108/00035590310492261

Publisher

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MCB UP Ltd

Copyright © 2003, MCB UP Limited

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