Influence of Element Penetration Region on Adhesion and Corrosion Performance of Ni-Base Coatings
| Autor: | Hongbing Cao, Jinran Lin, Zhenyu Shen, Xinxin Chen, Xiuqing Fu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
sandblasting pretreatment Ni–P–SiC coatings Nanoparticle Polishing 02 engineering and technology engineering.material Electrochemistry 01 natural sciences Corrosion Coating polishing pretreatment 0103 physical sciences Materials Chemistry scanning electrodeposition Composite material Coating adhesion computer.programming_language 010302 applied physics element penetration region Surfaces and Interfaces Penetration (firestop) 021001 nanoscience & nanotechnology Surfaces Coatings and Films lcsh:TA1-2040 Scratch engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology computer |
| Zdroj: | Coatings, Vol 10, Iss 895, p 895 (2020) Coatings Volume 10 Issue 9 |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings10090895 |
| Popis: | In this study, Ni&ndash P/Ni&ndash P&ndash SiC coatings were prepared on pretreated 45 steel substrates by scanning electrodeposition. Prior to the electrodeposition, the substrates were subjected to two types of pretreatments: polishing and sandblasting. The 3D morphology of the pretreated substrates was characterized by laser scanning confocal microscopy. The micromorphology and section morphology of the coating surface were characterized by field emission scanning electron microscopy. The section element composition was characterized using an EDS energy spectrum analyzer. The adhesion and corrosion resistance of 15 coatings were analyzed using an automatic scratch tester and CS350 electrochemical workstation. The results showed the presence of an element penetration region between the coating and the substrate. The sandblasting pretreatment and SiC nanoparticle addition helped widen the penetration region of the elements. The Ni&ndash SiC coating prepared by scanning electrodeposition on the sandblasted substrate exhibited the thickest penetration region, up to 28.39 µ m. A scratch test conducted on this coating showed that it exhibits the best adhesion force, up to 36.5 N. In electrochemical corrosion experiments, its corrosion potential was found to be the highest, reaching &minus 0.30 V, and the corrosion current density was the lowest, reaching 8.45 × 10&minus 7 A· cm&minus 2. The presence of the element penetration region increased the coating adhesion and improved the corrosion resistance. |
| Databáze: | OpenAIRE |
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