Effect of Sn and Al on Corrosion Resistance of Ni-free White Copper Alloy

doi:10.11902/1005.4537.2019.218

Journal of Chinese Society for Corrosion and protection

2020, Vol. 40

Issue (1): 45-50 DOI: 10.11902/1005.4537.2019.218

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Effect of Sn and Al on Corrosion Resistance of Ni-free White Copper Alloy

WANG Shuai,LIU Xinkuan(

),LIU Ping,CHEN Xiaohong,LI Wei,MA Fengcang,HE Daihua,ZHANG Ke

School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

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Abstract

A new Ni-free white copper alloy was designed by alloying with Sn and Al. The microstructure of the alloy was observed by optical microscopy and scanning electron microscopy (SEM). The corrosion resistance of the alloy was evaluated by dezincification corrosion test and electrochemical corrosion test. The mechanical properties were examined by tensile test and hardness test. The results show that the addition of trace Sn and Al can significantly improve the corrosion resistance and slightly improve the mechanical properties of the alloy.

Key words: corrosion alloy element white copper alloy

Received: 28 May 2019

ZTFLH:

TG178

Fund: National Natural Science Foundation of China(51201107)

Corresponding Authors: Xinkuan LIU E-mail: xinkuanliu@163.com

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	Shuai WANG
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	Xiaohong CHEN
	Wei LI
	Fengcang MA
	Daihua HE
	Ke ZHANG

Cite this article:

WANG Shuai,LIU Xinkuan,LIU Ping,CHEN Xiaohong,LI Wei,MA Fengcang,HE Daihua,ZHANG Ke. Effect of Sn and Al on Corrosion Resistance of Ni-free White Copper Alloy. Journal of Chinese Society for Corrosion and protection, 2020, 40(1): 45-50.

URL:

https://www.jcscp.org/EN/10.11902/1005.4537.2019.218 OR https://www.jcscp.org/EN/Y2020/V40/I1/45

Table 1 Main chemical compositions of alloy No.1~7 (mass fraction / %)

Table 2 Color indicators of alloy samples No.1~7

Fig.1 Variations of the dezincification corrosion depth with the content of Sn (a) and Al (b)

Fig.2 Sample corrosion depth of 1^# (a), 4^# (b) and 7^# (c) samples

Fig.3 SEM images of the cross section of the Ni-free white copper alloy sample dezincification layer of 1^# (a), 4^# (b) and 7^# (c) samples

Fig.4 Polarization curves of three alloys in 3.5%NaCl solution

Table 3 Electrochemical parameters obtained from polarization curves

Fig.5 Variation of microhardness of alloy samples with Sn (a) and Al (b)

Fig.6 Variation of tensile strength of alloy samples with Sn (a) and Al (b) contents

Fig.7 Variation of the elongation of the alloy sample with the content of Sn (a) and Al (b) contents

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