Ni coatings for corrosion protection of Mg alloys prepared by an in-situ micro-forging assisted cold spray: Effect of powder feedstock characteristics
| Autor: | Guo-Sheng Huang, Ying-Kang Wei, Chang-Jiu Li, Renzhong Huang, Yingchun Xie, Yi Ge, Xin Chu, Xiao-Tao Luo |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Magnesium 020209 energy General Chemical Engineering Metallurgy Gas dynamic cold spray chemistry.chemical_element 02 engineering and technology General Chemistry engineering.material 021001 nanoscience & nanotechnology Electrochemistry Forging Corrosion Nickel chemistry Coating 0202 electrical engineering electronic engineering information engineering engineering General Materials Science 0210 nano-technology Porosity |
| Zdroj: | Corrosion Science. 184:109397 |
| ISSN: | 0010-938X |
| DOI: | 10.1016/j.corsci.2021.109397 |
| Popis: | Three nickel (Ni) powders, i.e. gas-atomized spherical Ni (GA-Ni), carbonyl irregular Ni (C-Ni), and electrolytic dendritic porous Ni (E-Ni), were sprayed on magnesium alloys by an in-situ micro-forging assisted cold spray method. Although all deposited coatings present extremely low porosity, the C-Ni and E-Ni coatings reveal poorer inter-particle bonding than GA-Ni coating. Electrochemical tests reveal that the inter-particle gaps will act as fast pathways for the corrosive media to penetrate the coatings, thereby the GA-Ni coating with intimate inter-particle boundaries can isolate the corrosive media for 3000 h and the C-Ni and E-Ni coatings fail after |
| Databáze: | OpenAIRE |
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