黄铜在酸碱盐腐蚀介质中的腐蚀研究

doi:10.11896/j.issn.1005-023X.2018.02.014

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Abstract

Scanning electronic microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), electro probe micro-analysis (EPMA), open-circuit potential and potentiodynamic polarization and X-ray photoelectron spectroscopy (XPS) were used to explore the corrosion mechanism and morphology of HSn62-1 brass in H₂SO₄ solution(pH=2),NaOH solution(pH=13) and NaCl solution(3.5%, mass fraction). The results indicated that there existed obvious weight loss in H₂SO₄ solution compare to NaOH solution and NaCl solution. Numerous corrosion products were detected except CuO and ZnO. The dezincification of HSn62-1 in H₂SO₄ solution can be explained as selective dissolution and its cathodic reactions were dominated by oxygen reduction and hydrogen reaction. In contrast, the dezincification mechanism was simultaneous dissolution of both zinc and copper and with the subsequent re-deposition of copper. Besides the cathodic reaction was hydrogen evolution corrosion in NaCl solution and oxygen evolution corrosion in NaOH solution.

Key words： different corrosion mediators HSn62-1 corrosion mechanism

Published: 25 January 2018

CLC number:

TG174.3

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	Articles by authors
	Xinlin LI
	Guo JIN
	Lixia KANG
	Xuejia PANG
	Weiqi CAO
	Haidou WANG
	Binshi XU
	Xiufang CUI

Cite this article:

Xinlin LI,Guo JIN,Lixia KANG, et al. Study of Corrosion Behavior of HSn62-1 in Acid,Alkali and Salt Solution[J]. Materials Reports, 2018, 32(2): 228-233.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.02.014 OR http://www.mater-rep.com/EN/Y2018/V32/I2/228

Corrosion morphology of HSn62-1 immersed in acidic medium for:(a) 6 h, (b) 30 h

XPS analysis of corrosion products of HSn62-1 in H₂SO₄ solution (pH=2)

EPMA images of HSn62-1 immersed in H₂SO₄(pH=2) for 30 h

Corrosion morphology of HSn62-1 immersed in NaOH solution for:(a) 6 h, (b) 30 h

XPS analysis for the corrosion products of HSn62-1 in NaOH solution (pH=13)

Surface scanning of HSn62-1 immersed in NaOH solution for 30 h

Corrosion morphology of HSn62-1 immersed in 3.5wt% NaCl for:(a) 6 h, (b) 30 h

XPS analysis of corrosion products of HSn62-1 in NaCl solution

EPMA images of HSn62-1 immersed in NaCl solution for 30 h

Mass loss curves of HSn62-1 with time in the three solutions

Potentiodynamic polarization curves of HSn62-1 in the three solutions

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