Corrosion behavior of additive manufactured Ti-6Al-4V in sulfamic acid cleaning solution

Wenbin Qiu; Yongqiang Wei; Aijun Chen; Hao Deng; Lvjun Zhou; Hanyang Zuo; Longqing Chen; Zuxi Xia; Hui Wang; Jun Tang

doi:10.1039/D0NJ05731B

Corrosion behavior of additive manufactured Ti-6Al-4V in sulfamic acid cleaning solution

Wenbin Qiu,

†^a Yongqiang Wei,†^b Aijun Chen,^ac Hao Deng,^a Lvjun Zhou,^a Hanyang Zuo,^a Longqing Chen,^a Zuxi Xia,^b Hui Wang^d and Jun Tang*^a

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* Corresponding authors

^a Key Laboratory of Radiation Physics and Technology of Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China
E-mail: tangjun@scu.edu.cn

^b The Second Research Institute of Civil Aviation Administration of China (CAAC), Chengdu, China

^c Yibin University, 8 Jiusheng Road, Yibin, China

^d State Key Lab of Powder Metallurgy, Central South University, Changsha 410083, P. R. China

Abstract

In the current work, the corrosion behaviors of Ti-6Al-4V alloys manufactured using spark plasma sintering (SPS), selective laser melting (SLM) and electron beam melting (EBM) techniques are comparably investigated using aircraft deicer (10% sulfamic acid cleaning solution, 10-SACS). The corrosion resistance of different Ti-6Al-4V samples is mainly characterized using electrochemical measurements and immersion tests. The traditional SPS Ti-6Al-4V alloy has a stronger corrosion resistance compared to the SLM Ti-6Al-4V alloy, and the one manufactured using the EBM technique is the most vulnerable among all samples tested. Based on the X-ray diffraction (XRD) measurements, the β-phase constitution fraction of SPS Ti-6Al-4V is 11.8%, while those of SLM and EBM Ti-6Al-4V alloys are 5.3% and 2.6%, respectively. The corrosion resistance of Ti-6Al-4V alloys against 10-SACS is found to be positively correlated to the β phase composition. In addition, a high density of coarse grain boundaries is also partially beneficial in improving the corrosion resistance in the SPS sample. This work paves a way for the practical application of additive manufactured Ti-6Al-4V alloys to be used in harsh environments.

New Journal of Chemistry

Corrosion behavior of additive manufactured Ti-6Al-4V in sulfamic acid cleaning solution

Abstract

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