Online from: 1954
Subject Area: Mechanical & Materials Engineering
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|Title:||A study of the influence of chloride ion concentration on the corrosion behavior of carbon steel in phosphate high-temperature boiler water chemistries|
|Author(s):||Cao Shun'an, (College of Dynamics and Mechanical Engineering, Wuhan University, Wuhan, People's Republic of China), Zhu Qing, (East China Electric Power Test & Research Institute Limited Company, Shanghai, People's Republic of China), Zhang Zhixin, (Qianqing Power Plant, Hanzhou, People's Republic of China)|
|Citation:||Cao Shun'an, Zhu Qing, Zhang Zhixin, (2008) "A study of the influence of chloride ion concentration on the corrosion behavior of carbon steel in phosphate high-temperature boiler water chemistries", Anti-Corrosion Methods and Materials, Vol. 55 Iss: 1, pp.15 - 19|
|Keywords:||Films (states for matter), High temperatures, Steel Corrosion, Water|
|Article type:||Research paper|
|DOI:||10.1108/00035590810842780 (Permanent URL)|
|Publisher:||Emerald Group Publishing Limited|
Purpose – This paper sets out to study the corrosion of No. 20 carbon steel without film and with films of different qualities in high-temperature boiler water with different Cl- concentrations.
Design/methodology/approach – The static simulated experiment in high-pressure autoclave and the surface analysis methods of EPMA and XRD were carried out to study the corrosion effect.
Findings – Under the following conditions:
Practical implications – In order to prevent carbon steel from corroding in boiler water containing Cl- under conditions of low-phosphate and low-sodium hydroxide treatment, the concentration of Cl- should be strictly controlled.
Originality/value – It was found that the presence of excessive Cl- in boiler water accelerated the corrosion of No. 20 carbon steel and the maximum permissible concentration of Cl- under the conditions (temperature and pressure) of sub-critical drum boilers was 0.2?mg/l. The research results can provide theoretical guidelines for preventing the facilities of power plants from corroding.
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