涂层
材料科学
衍射仪
腐蚀
微观结构
冶金
盐雾试验
热喷涂
基质(水族馆)
复合材料
扫描电子显微镜
海洋学
地质学
标识
DOI:10.1142/s0218625x18501159
摘要
An Al coating was sprayed on S355 steel using a cold spraying. The surface–interface morphologies, chemical compositions, and phases of the obtained Al coating were analyzed using a field emission scanning electronic microscope (FESEM), energy dispersive spectrometer (EDS), and X-ray diffractometer (XRD), respectively, and the chemical element distributions of Al coating surface and interface were also analyzed using a plane scan, and line scan, respectively. The salt spray corrosion (SSC) of cold sprayed Al coating was investigated using a neutral salt spray (NSS) test, the corrosion products on the Al coating were also analyzed using an EDS and XRD. The result shows that the cold sprayed Al coating is composed of Al phase, the Al particles are distorted when colliding with the substrate, the interface bonding mode is a mechanical bonding. The cold sprayed Al coating is covered with a stable corrosion products, which effectively prevents the coating from further SSC, showing an excellent corrosion resistance. The Al coating has appropriate cathodal protection potential, the corrosion rate of Al coating declines with the time in the electrochemical test.
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