意义和目的
3.1 半个多世纪以来, the Sward type hardness rocker instruments have been used by the coating industry as NDE instruments to measure the cured and final surface hardness of organic coatings (参见参考文献). (1) 通过 (2)). This test method can be used in the laboratory to quickly screen and measure the surface hardness of candidate coatings.

笔记 1: In a previous task group aimed at establishing an ASTM method for measuring the hardness of organic coatings using a Sward type hardness rocker arm instrument, cyclic test results consistently showed poor inter-laboratory reproducibility. The lack of inter-laboratory agreement may be caused by dimensional differences between instruments, and in this regard contact with the rocker arm ring is a very likely violator. Several manufacturers of the Sward type hardness rocker produce instruments that vary in net weight and ring radius. Some of them exceed the measured values and net weights required in this test method.

美国材料试验协会D 2134-93-2019 用Swalt型硬度计测定有机涂层的硬度

范围
1.1 The test method covers the determination of the relative degree of surface hardness of organic coatings using specific equipment used in the coating industry.

1.2 以 SI 单位表示的值应被视为标准. 括号内的数值仅供参考.

1.3 This test method is not intended to address all safety issues, 如果有的话, 与其使用相关. 本标准的使用者有责任建立适当的安全机制, 健康和环境实践，并在使用前确定监管限制的适用性.

1.4 本国际标准是根据《关于制定国际标准的原则的决定》中确立的国际公认的标准化原则制定的, 世界贸易组织贸易技术壁垒委员会发布的指南和建议.