Journal of the Korean Institute of Gas (한국가스학회지)
- Volume 9 Issue 1 Serial No. 26
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- Pages.21-25
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- 2005
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- 1226-8402(pISSN)
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- 2713-6922(eISSN)
The Study on the Corrosion Behavior of STS 304 for Gas Boiler in the Condensed Water
응축수 중에서 가스보일러용 STS 304의 부식거동에 관한 연구
- Du Yun Byoung (School of Chemical Engineering, Pukyong National University) ;
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Lim Uh Joh
(School of Chemical Engineering, Pukyong National University) ;
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Jeong Ki Cheol
(Dept. of Refrigeration & Air-Conditioning, Tongmyong College)
- Published : 2005.03.01
Abstract
This paper was studied on the corrosion behavior of STS 304 for gas boiler in the condensed water, the electrochemical polarization test of STS 304 for gas boiler in the condensed water was carried out. And the corrosion behavior of STS 304 was considered. The main results are as following: 1) As corrosion environment is acidified from neutrality, the polarization resistance of STS 304 decreases and the corrosion potential is less noble. 2) The corrosion reaction mechanism of STS 304 is cathodic control. 3) As corrosion environment is acidified, the passive potential range of STS 304 decreases. Also, the passive current density of STS 304 increases.
가스보일러용 오스테나이트계 스테인리스강재(STS 304)의 부식거동에 관해 연구하기 위하여, 응축수중에서 전기화학적 부식시험을 수행하여. STS 304의 전기화학적 부식거동을 고찰하였다. 다음과 같은 결론을 얻었다. 1)중성환경인 pH=6.5에서 pH가 낮아질수록 STS 304의 분극저항은 감소하고, 부식전위는 비전위화된다. 2)중성 및 산성환경 중에서 STS 304의 부식반응기구는 음극지배로 판단된다. 3) pH가 중성 환경인 pH=6.5에서 강산성 환경인 pH=0.5로 낮아질수록 STS 304의 부동태 전위영역이 감소하고 부동태유지 전류밀도는 증가하고 있다.