ISO 11124-3:2018标准规定了高碳铸钢弹丸和砂粒的技术要求和试验方法。该标准适用于钢材表面处理前的金属喷砂清理，以确保表面清洁度和粗糙度符合涂层施工的要求。标准要求磨料的化学成分、硬度、密度、形状、尺寸、磨损率等指标符合规定，以保证喷砂清理效果和涂层附着力。

该标准主要包括以下内容：

1.术语和定义：对标准中使用的术语和定义进行了说明，以便于理解和使用。

2.分类和标记：对高碳铸钢弹丸和砂粒进行了分类和标记，以便于区分和使用。

3.技术要求：对高碳铸钢弹丸和砂粒的化学成分、硬度、密度、形状、尺寸、磨损率等指标进行了规定，以保证喷砂清理效果和涂层附着力。

4.试验方法：对高碳铸钢弹丸和砂粒的试验方法进行了规定，包括化学成分分析、硬度测试、密度测试、形状和尺寸测量、磨损率测试等。

5.标志和包装：对高碳铸钢弹丸和砂粒的标志和包装进行了规定，以便于使用和管理。

该标准的实施可以有效地保证钢材表面处理的质量和效果，提高涂层的附着力和耐久性，延长涂层的使用寿命。同时，该标准也为金属喷砂清理磨料的生产和销售提供了技术规范和质量保证。

相关标准
ISO 11124-1:2018 Preparation of steel substrates before application of paints and related products — Specifications for metallic blast-cleaning abrasives — Part 1: General introduction and classification
ISO 11124-2:2018 Preparation of steel substrates before application of paints and related products — Specifications for metallic blast-cleaning abrasives — Part 2: Chilled-iron grit
ISO 8501-1:2007 Preparation of steel substrates before application of paints and related products — Visual assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings
ISO 8503-1:2012 Preparation of steel substrates before application of paints and related products — Surface roughness characteristics of blast-cleaned steel substrates — Part 1: Specifications and definitions for ISO surface profile comparators for the assessment of abrasive blast-cleaned surfaces
ISO 8504-2:2000 Preparation of steel substrates before application of paints and related products — Surface preparation methods — Part 2: Abrasive blast-cleaning