Chemical conversion of zinc–zinc phosphate composite coating on TC4 by galvanic coupling
| Autor: | Wen-hua Xu, Gui-yong Xiao, Yu-peng Lu, Yong-zhen Zheng, Cong-cong Jiang, Ling-ling Wang |
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| Rok vydání: | 2017 |
| Předmět: |
Chemistry
Composite number Metallurgy Zinc phosphate chemistry.chemical_element 02 engineering and technology General Chemistry Zinc engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Catalysis 0104 chemical sciences Corrosion chemistry.chemical_compound Coating Materials Chemistry engineering Coupling (piping) Composite material Magnesium alloy 0210 nano-technology |
| Zdroj: | New Journal of Chemistry. 41:14403-14408 |
| ISSN: | 1369-9261 1144-0546 |
| DOI: | 10.1039/c7nj02382k |
| Popis: | Galvanic coupling approach was introduced into chemical conversion of zinc–zinc phosphate composite coatings on Ti-6Al-4V (TC4) to overcome their surface inertness. The phase composition, morphology, electrochemical performance and adhesive strength of the coating were studied by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), electrochemical workstation system and scratch tester, respectively. The results showed that the uniform and fine zinc–zinc phosphate (Zn3(PO4)2·4H2O) composite coatings were prepared on TC4 by galvanic coupling with AZ91D magnesium alloy (MA). The area ratio of TC4 to MA being 1 : 1 in coupling pair presented better corrosion resistance. The scratch test revealed that the coating formed by galvanic coupling at the area ratio of 1 : 2 presented better adhesive strength between coating and substrate. |
| Databáze: | OpenAIRE |
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