1.1 本规程描述了新的和风化的热浸镀锌钢表面的制备方法，用于液体涂料和涂料产品的涂装。在实践中，对新的和部分风化的镀锌钢表面进行粉末涂层处理 D7803 . 热浸镀锌钢是通过将已制造或未制造的产品浸入熔融锌槽中来生产的，如规范所规定 A123/A123M 或 A153/A153M . 本规程涵盖了之前未涂漆的钢铁产品和五金件的表面处理。镀锌表面可能已经过保护涂层处理，以防止出现湿储存污渍。本规程不适用于镀锌钢板产品，也不适用于线圈涂层或连续辊涂层工艺。 板材和卷材表面处理可根据实践进行 D7396 . 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 本规程描述了可用于在制造后的钢制品上制备新的和风化的镀锌表面以进行涂漆的程序，以及可改善油漆与锌表面的结合的程序。

1.1 This practice describes methods of preparing surfaces of new and weathered hot-dip galvanized steel for painting with liquid paint and coating products. Preparing surfaces of new and partially weathered galvanized steel for powder coating is addressed in Practice D7803 . Hot-dip galvanized steel is produced by the immersion of fabricated or unfabricated products in a bath of molten zinc, as specified in Specifications A123/A123M or A153/A153M . This practice covers surface preparation on iron and steel products and hardware that have not been painted previously. Galvanized surfaces may have been treated with protective coatings to prevent the occurrence of wet storage stain. This practice does not apply to sheet galvanized steel products nor to the coil coating or continuous roller coating processes. Sheet and coil surface preparation can be done in accordance with Practice D7396 . 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 This practice describes the procedures that can be used to prepare new and weathered zinc-coated surfaces on after-fabrication steel products for painting, and that can improve the bond of paint to the zinc surface.