"GB/T 19816.3-2005 Test method for metal abrasives for spray cleaning of steel surfaces prepared before coating Coatings, Part 3: Determination of Hardness" specifies the Vickers Hardness determination method for metal abrasives for jet cleaning. The standard is suitable for testing the Hardness of metal abrasives to ensure that they can effectively remove impurities on the surface of steel during spray cleaning without damaging the substrate. The standard clearly states that abrasives with particle size less than 0.3mm are not suitable for this method. The standard by the Chinese shipbuilding industry group company centralized, issued on June 10, 2005, November 1, 2005 implementation, for jet cleaning with metal abrasive quality control provides an important basis.