ISO 11125-3:2018标准规定了金属喷砂清理磨料硬度测试的方法。该标准适用于钢丸、钢砂、铝砂、铜砂、锌砂、铅砂、锡砂、铁砂和其他金属磨料。该标准的主要目的是确定磨料的硬度，以便在金属喷砂清理过程中选择合适的磨料。

该标准规定了用于测量磨料硬度的设备、试验程序和数据处理方法。测试设备包括硬度计和试验块。试验程序包括将试验块放置在硬度计上，然后将磨料投入硬度计中，测量磨料对试验块的压痕深度。数据处理方法包括计算磨料的平均硬度值和标准偏差。

该标准的测试结果可以用于选择合适的磨料，以便在金属喷砂清理过程中获得最佳的清理效果。此外，该标准还可以用于评估磨料的质量和性能。

相关标准
ISO 11124-3:1993 Preparation of steel substrates before application of paints and related products -- Specifications for metallic blast-cleaning abrasives -- Part 3: High-carbon cast-steel shot and grit
ISO 11125-1:1993 Preparation of steel substrates before application of paints and related products -- Test methods for metallic blast-cleaning abrasives -- Part 1: Sampling
ISO 11125-2:1993 Preparation of steel substrates before application of paints and related products -- Test methods for metallic blast-cleaning abrasives -- Part 2: Determination of particle size distribution
ISO 11125-4:1993 Preparation of steel substrates before application of paints and related products -- Test methods for metallic blast-cleaning abrasives -- Part 4: Determination of apparent density
ISO 11126-3:1993 Preparation of steel substrates before application of paints and related products -- Specifications for non-metallic blast-cleaning abrasives -- Part 3: Copper refinery slag