Corrosion resistant nickel coating with strong adhesion on AZ31B magnesium alloy prepared by an in-situ shot-peening-assisted cold spray. (1st July 2018)

• Record Type: Journal Article
• Authors: Wei, Ying-Kang; Li, Yu-Juan; Zhang, Yue; Luo, Xiao-Tao; Li, Chang-Jiu
• Is Part Of: Corrosion science. Volume 138(2018)
• Page Start: 105
• Page End: 115
• Publication Date: 2018-07-01
• Subjects: Cold spray -- Corrosion protection coating -- Magnesium -- Nickel -- Polarization -- EIS; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2018.04.018
• Languages: English
• ISSNs: 0010-938X

Abstract

Graphical abstract: Highlights: Fully dense Ni was coated on AZ31B by an in-situ shot peening assisted cold spray. Strong adhesion > 64.5 MPa was achieved for the Ni coating on AZ31B. The Ni coated AZ31B presents comparable corrosion performance with bulk Ni. This Ni coating can effectively isolate the corrosive media for 1000 h. Abstract: A 150 μm thick fully dense Ni coating was deposited on AZ31B magnesium alloy by a newly developed in-situ shot-peening-assisted cold spray process. Strong adhesion strength of Ni coating (>65.4 MPa) was achieved. The present Ni coated AZ31B reveals comparable electrochemical behavior with annealed bulk Ni in 3.5 wt.% NaCl aqueous solution. Long-term immersion test (1000 h) and NaCl salt spray test (1000 h) further verified the robust corrosion resistance of the cold sprayed Ni coating. This work provides a novel green approach for corrosion protection of magnesium alloys.