GB8923-88《涂装前钢材表面锈蚀等级和除锈等级》Rust grades and preparation grade of steel surfaces before application of paints and related products 本标准规定了涂装前钢材表面锈蚀程度和除锈质量的目视评定等级它适用于以喷射或抛射除锈手工和动力工具除锈以及火焰除锈方式处理过的热轧钢材表