ASTM A239-2014 铁或钢制品上镀锌层最薄点的定位规程

　　ASTM A239-2014

　　中文名称：铁或钢制品上镀锌层薄点的定位规程

　　英文名称：Standard Practice for Locating the Thinnest Spot in a Zinc (Galvanized) Coating on Iron or Steel Articles,

　　原文名称：Standard Practice for Locating the Thinnest Spot in a Zinc (Galvanized) Coating on Iron or Steel Articles,

　　范 围：This practice is designed to locate the thinnest portions of the zinc coating on newly coated items (see Appendix X1). Variations in coating thickness can be due to the process by which the zinc is applied (hot dipped, electroplated, or sprayed) or by the geometry of the part that is coated. During hot-dip galvanizing, the coating thickness is affected by the drainage pattern of the molten zinc, while during zinc spraying (metallizing), coating thickness can be dependent on the operator's manipulation of the spray nozzle. The geometry of the part can also influence coating thickness especially during hot-dip galvanizing, where peaks and valleys on the part can cause molten zinc to build up or thin out. This practice is designed to identify those areas of the part where the coating is thin.

　　发布日期：2014-05-01

　　实施日期：2014-05-01

　　标准组织：美国试验与材料协会标准(ASTM)

　　ICS分类号：(25.220.40)金属镀层

　　中国标准分类号：(A29)材料防护

　　同一中标分类下的其他标准

　　• API TR 939-D-2007

　　• ASTM A143/A143M-2007(2014)防止热浸镀锌结构钢制品变脆和检测变脆程序的规程

　　• ASTM A153/A153M-2009钢铁构件镀锌层(热浸)规格

　　• ASTM A384/A384M-2007　钢制组装件热浸镀锌时防翘曲和变形的规程

　　• ASTM A90/A90M-2013钢铁制品上锌或锌合金镀层重量(质量)试验方法

　　• ASTM A90/A90M-2013(R2018)

　　• ASTM A123/A123M-2013钢铁制品镀锌层(热浸镀锌)规格

　　• ASTM A123/A123M-2017