304不锈钢在Al-6Si-10Cu储能合金液中的腐蚀行为

doi:10.11896/cldb.17090234

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Abstract The compatibility of phase change energy storage materials with containers is one of the key factors for the successful application of solar energy storage technology. In this work, Al-6Si-10Cu alloy was chosen as the heat storage material, the 304 stainless steel as the container material. By designing a liquid corrosion test, the corrosion behavior and mechanism of 304 stainless steel in Al-6Si-10Cu energy storage alloy li-quid were investigated with the aid of metallographic microscope ,electron probe and XRD analyzer ect. What's more, the kinetic analysis of corrosion reaction was also carried out. The results showed that the corrosion layer consists of a inside layer and a outside layer. The inner corrosion layer is mainly composed of Al₉₅Fe₄Cr phase,banded and denser. And its microhardness is bigger than the outer layer's. The outer corrosion la-yer is loose and is mainly composed of Fe_xSi_yAl_zphase and FeAl phase. Due to the blocking effects of intermetallic compounds such as Al₉₅-Fe₄Cr and Fe_xSi_yAl_z on the diffusion of elements, the corrosion rate decreases first and then tends to slow down with the erosion time increasing. The thickness of corrosion layer and the corrosion weight loss increase gradually with the increase of the time,and then tend to be stable. The corrosion product's growth index n is 0.673, indicating that the corrosion type is diffusion corrosion.

Key words： Al-Si-Cu alloy phase change energy storage 304 stainless steel erosion

Published: 16 May 2019

CLC number:

TG178

Fund:This work was financially supported by the Fundamental Research Funds for the Central Universities(11CX05003A), National Innovation Training Program for College Students (201713386029).

About author:: Xiaohua Zhang is currently a lecturer of Shengli College, China University of Petroleum. She received her M.E. degree in China University of Petroleum and her major research interests are material failure and surface modification
Sirong Yu is currently a professor and doctoral supervisor of China University of Petroleum. His major research interests are metal materials and surface engineering.

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	ZHANG Xiaohua
	YU Sirong
	TAN Zhe
	GUO Lijuan
	LIU Xu

Cite this article:

ZHANG Xiaohua,YU Sirong,TAN Zhe, et al. Corrosion Behavior of 304 Stainless Steel in Al-6Si-10Cu Energy Storage Alloy Solution[J]. Materials Reports, 2019, 33(10): 1681-1684.

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http://www.mater-rep.com/EN/10.11896/cldb.17090234 OR http://www.mater-rep.com/EN/Y2019/V33/I10/1681

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