1.1 本规范建立了一种实验室进行的定量电解还原方法，以确定按规范生产的铜棒表面氧化铜膜的厚度 B49页 用于进一步制造电导体。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 铜棒表面存在的氧化铜层对通过冷拔铜棒生产的铜线的最终表面质量以及拉拔过程本身都有不利影响，从而导致断线和拉拔模具过度磨损。因此，在铜棒制造过程中使用适当的清洁技术以限制成品棒上残留氧化铜层的深度至关重要，并且有必要找到一种精确测量氧化铜深度的方法。 5.2 本试验方法是连铸机和轧钢机用于测量铜棒清洗后残留表面氧化物深度的最常用试验方法。 5.3 尚未评估试验方法对任何其他目的或产品的适用性。超出规定范围的适用性应在使用前进行评估。

1.1 This specification established a quantitative, laboratory conducted, electrolytic reduction method to determine the thickness of surface copper oxide films on copper rod produced to Specification B49 for further fabrication into electrical conductors. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The copper oxides layer present on the surface of the copper rod has a detrimental effect on both final surface quality of the copper wire produced by cold drawing of the rod, and on the drawing process itself leading to wire breaks and excessive wear of the drawing dies. Thus, it is critical to use adequate cleaning techniques during the copper rod manufacturing process in order to limit the depth of the residual copper oxide layer on the finished rod, and it is necessary to have a method to accurately measure the copper oxide depth. 5.2 This test method is the most common test method used by continuous casting and rolling mills to measure the depth of residual surface oxides after the copper rod has been cleaned. 5.3 Applicability of the test method for any other purpose or product has not been evaluated. Suitability beyond the stated scope shall be evaluated before use.