Random field characterisation of stress-normalised cone penetration testing parameters
Random field characterisation of stress-normalised cone penetration testing parameters
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DOI：
10.1680/geot.2005.55.1.3
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发表时间：
2005-02
期刊：
影响因子：
10.9
通讯作者：
M. Uzielli;G. Vannucchi;K. Phoon
中科院分区：
文献类型：
--
作者：
M. Uzielli;G. Vannucchi;K. Phoon
本文提供了用于在金属制品上生产多金属扩散涂层的方法和组合物，在长时间暴露于腐蚀条件下，特别是在高盐含量的海洋大气中，特别是在保护涂层也受到机械侵蚀和磨蚀环境的情况下，提供对涂层表面的化学或电偶腐蚀的长期保护。选择多种涂层金属，使其组合提供从外表面向涂层层和被涂件的界面方向随其厚度变化的涂层，从而在外表面具有最大的耐化学腐蚀的机械性能，但随着涂层厚度的侵蚀而降低；而提供牺牲保护或阴极保护的涂层组分更集中在涂层-物品界面附近，因此当涂层因磨损或侵蚀而被去除时，涂层物品的阴极保护增加。作为说明，外层涂层表面包括高浓度的固有耐盐腐蚀和/或磨损的金属成分，尽管为涂层制品提供较少的阴极保护；而涂层的内层富含金属成分，提供高牺牲或阴极保护，尽管较低的侵蚀或耐盐腐蚀。
Methods and compositions are provided herewith for the production of multimetal diffusion coatings on metal articles providing prolonged protection against chemical or galvanic corrosion of the surface of the coated article during prolonged exposure to corrosive conditions, and particularly high-saline content marine atmospheres, especially where the protective coating is also subjected to mechanically erosive and abrasive environments, with the multiplicity of coating metals being selected so that the combination thereof provides a coating varying through the thickness thereof from outer surface toward the interface of coating layer and coated article so that the mechanical resistance to chemical corrosion is greatest at the outer surface but decreases as the coating thickness is eroded away, while the components of the coating offering sacrificial or cathodic protection are more concentrated adjacent the coating-article interface so that cathodic protection of the coated articles increases as the coating is removed by abrasion or erosion. As illustrative, the outer coating surface includes a high concentration of metallic components inherently resistant to saline corrosion and/or abrasion, although offering less cathodic protection for the coated article; while inner layers of the coating are rich in metallic components offering high sacrificial or cathodic protection, although less erosion or saline corrosion resistance.