涂料和相关产品使用前钢衬底的制备.表面清洁度的目测评估.第1部分:未涂覆钢衬底和彻底清除原有涂层后钢衬底的锈蚀等级和制备等级

[中文适用范围]： ISO 8501 的这一部分规定了一系列钢材表面的防锈等级和处理等级（分别参见第 2 条和第 3 条）。 各种等级是通过书面描述和照片来定义的，这些照片是每个等级在文字描述的公差范围内的代表性示例。 它适用于通过喷砂清理、手动和电动工具清理以及火焰清理等方法准备涂漆的热轧钢表面，尽管这些方法很少产生可比较的结果。 本质上，这些方法适用于热轧钢，但喷砂清理方法也可用于厚度足够的冷轧钢，以承受磨料冲击或电动工具影响引起的任何变形打扫。 ISO 8501 的这一部分也适用于除残留氧化皮外还残留有牢固粘附的油漆和其他异物（参见注释 2 至 3.1）的钢基材。 [外文原描述]： ISO 8501-1:2007 is a hardback A5-format book in four languages (English, French, German and Swedish), which specifies a series of rust grades and preparation grades of steel surfaces. The various grades are defined by written descriptions together with photographs that are representative examples within the tolerance for each grade as described in words. It is applicable to hot-rolled steel surfaces prepared for painting by methods such as blast-cleaning, hand and power tool cleaning and flame cleaning, although these methods rarely lead to comparable results. Essentially, these methods are intended for hot-rolled steel, but blast-cleaning methods, in particular, could also be used on cold-rolled steel of sufficient thickness to withstand any deformation caused by the impact of the abrasive or the effects of power tool cleaning. This part of ISO 8501 is applicable also to steel substrates that show residues of firmly adhering paint and other foreign matter in addition to residual mill scale.