CORROSION BEHAVIORS OF 304 STAINLESS STEEL IN LOW HARDNESS COOLING WATER CONTAINING Cl-, SO42-AND RP-98H WATER TREATMENT AGENT

J Chin Soc Corr Pro

2009, Vol. 29

Issue (3): 187-190 DOI:

技术报告

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CORROSION BEHAVIORS OF 304 STAINLESS STEEL IN LOW HARDNESS COOLING WATER CONTAINING Cl^-, SO₄^2-AND RP-98H WATER TREATMENT AGENT

QU Xiuhua; XU Chunchun; LV Guocheng; CHENG Haidong

College of Materials Science and Engineering; Beijing University of Chemical Technology;Beijing 100029

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Abstract

The polarization curves, electrochemical noise, electrochemical impendence spectroscopy(EIS) and energy dispersive spectrometry(EDS) were employed to investigate the corrosion behaviors of 304 stainless steel (SS) in simulated low hardness cooling water containing Cl^-, SO₄^2-. The influence of RP-98H water treatment agent on the corrosion of 304 SS and the corresponding inhibition mechanism were also studied. The results showed that, corrosive ion Cl^- increased the pitting susceptibility of 304 SS and SO₄^2- reduced the effect of Cl^-, while RP-98H rapidly produced a layer of film which is capable of improving the pitting potential of 304 SS and inhibiting the corrosion. RP-98H is a type of mixed water treatment agent with the inhibition efficiency over 84.8 %, and the excellent concentration for the system of 304 SS-low hardness cooling water is proved to be 100 mg/L.

Key words: water treatment agent pitting corrosion low hardness cooling water 304 SS

Received: 24 July 2007

ZTFLH:

TG174.4

Corresponding Authors: XU Chunchun E-mail: chunchunxu@263.net

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Cite this article:

QU Xiuhua XU Chunchun LV Guocheng CHENG Haidong. CORROSION BEHAVIORS OF 304 STAINLESS STEEL IN LOW HARDNESS COOLING WATER CONTAINING Cl^-, SO₄^2-AND RP-98H WATER TREATMENT AGENT. J Chin Soc Corr Pro, 2009, 29(3): 187-190.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2009/V29/I3/187

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