Preparation of chemical conversion super-black films on ZK61M magnesium alloy
| Autor: | Zhaojun Tan, Xianjie Yuan, Zhenwei Yan |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
chemistry.chemical_classification Materials science Magnesium Scanning electron microscope Metallurgy Analytical chemistry chemistry.chemical_element Salt (chemistry) 02 engineering and technology Surfaces and Interfaces 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Surfaces Coatings and Films Corrosion chemistry 0103 physical sciences Materials Chemistry 5052 aluminium alloy 6063 aluminium alloy Magnesium alloy 0210 nano-technology |
| Zdroj: | Surface Engineering. 34:884-891 |
| ISSN: | 1743-2944 0267-0844 |
| DOI: | 10.1080/02670844.2017.1386924 |
| Popis: | Four different super-black conversion films on ZK61M magnesium alloys were investigated in this work. Macro- and micro-morphologies of the conversion films were observed using a digital camera and scanning electron microscope, respectively. Salt spray testing and electrochemical measurements were used to examine the corrosion resistance of the conversion films. The emissivities of the conversion films were measured using the Fourier transform infrared spectrometry. The results show that all conversion films reduced the corrosion rate of the magnesium alloy substrates effectively; in particular, the film prepared using 230 g L−1 HF + 150 g L−1 Na2Cr2O7·2H2O + 2.5 g L−1 CaF2 mixed solution had a higher corrosion resistance. Moreover, the emissivities of the conversion films prepared using 230 g L−1 HF + 180 g L−1 Na2Cr2O7·2H2O + 270 g L−1 HNO3 and 230 g L−1 HF + 150 g L−1 Na2Cr2O7·2H2O + 2.5 g L−1 CaF2 mixed solutions were very high; the values exceeded 0.9 at room temperature. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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