1.1 本规程涵盖了当与可制成螺杆的阴极材料接触时，可制成导线的任何阳极材料的大气电偶腐蚀评估。 1.2 当某些材料用于阳极和阴极时，该实践已用于评估大气的腐蚀性。 1.3 1955年首次描述了螺栓连接导线试验 ( 1. ) , 2. 此后，它被广泛用于标准材料，以气候试验的名义测定大气的腐蚀性( 氯 协助 我 工业和 M 阿琳 在 mospheres） ( 2- 5. ) 和ATCORR( 在 穆斯林的 更正 透明度） ( 6- 9 ) . 1.4 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。 1.5 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。 1.6 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 与在大气暴露中的短电偶相互作用距离相比，导线的小尺寸提供了大的阴极与阳极面积比，从而加速了电偶腐蚀。金属丝和螺纹之间的区域形成了一条长而紧密的缝隙，也加速了腐蚀。由于这些原因，这种典型暴露期为90天的做法是最快速的大气电偶腐蚀试验，尤其是与试验方法相比 G104 . 该测试持续时间短意味着可以评估季节性大气变化。（如果需要1年内的平均表现，则该技术需要多次交错暴露。 )这种做法的再现性比其他大气电偶腐蚀试验要好一些。 5.2 该测试的主要缺点是阳极材料必须以线材形式提供，阴极材料必须以螺杆形式提供。这应与试验方法进行比较 G104 如果仅使用板材或薄板材料。 5.3 另一个限制是，必须事先知道对中更多的阳极材料（来自指南中的信息） G82 )或组装时材料组合必须颠倒。 5.4 这种做法无法评估腐蚀的形态或其对基材机械性能的影响。试验方法 G104 最好是用于此目的。 5.5 本试验以CLIMAT和ATCORR的名义使用，通过暴露由1100铝（UNS A91100）丝缠绕在尼龙、1010低碳钢（UNS G10100或G10080）和CA110铜（UNS C11000）螺纹杆上制成的相同试样来确定大气腐蚀性。 然而，大气腐蚀性是腐蚀材料的函数。如果选择不同的材料组合，大气的相对腐蚀性可能会大不相同。

1.1 This practice covers the evaluation of atmospheric galvanic corrosion of any anodic material that can be made into a wire when in contact with a cathodic material that can be made into a threaded rod. 1.2 When certain materials are used for the anode and cathode, this practice has been used to rate the corrosivity of atmospheres. 1.3 The wire-on-bolt test was first described in 1955 ( 1 ) , 2 and has since been used extensively with standard materials to determine corrosivity of atmospheres under the names CLIMAT Test ( CL assify I ndustrial and M arine AT mospheres) ( 2- 5 ) and ATCORR ( AT mospheric CORR osivity) ( 6- 9 ) . 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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. 1.6 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 small size of the wire compared to the short galvanic interaction distance in atmospheric exposures gives a large cathode-to-anode area ratio which accelerates the galvanic attack. The area between the wire and the threads creates a long, tight crevice, also accelerating the corrosion. For these reasons, this practice, with a typical exposure period of 90 days, is the most rapid atmospheric galvanic corrosion test, particularly compared to Test Method G104 . The short duration of this test means that seasonal atmospheric variability can be evaluated. (If average performance over a 1-year period is desired, several staggered exposures are required with this technique.) Reproducibility of this practice is somewhat better than other atmospheric galvanic corrosion tests. 5.2 The major disadvantage of this test is that the anode material must be available in wire form and the cathodic material must be available in the form of a threaded rod. This should be compared to Test Method G104 where plate or sheet material is used exclusively. 5.3 An additional limitation is that the more anodic material of the pair must be known beforehand (from information such as in Guide G82 ) or assemblies must be made with the material combinations reversed. 5.4 The morphology of the corrosion attack or its effect on mechanical properties of the base materials cannot be assessed by this practice. Test Method G104 is preferable for this purpose. 5.5 This test has been used under the names CLIMAT and ATCORR to determine atmospheric corrosivity by exposing identical specimens made from 1100 aluminum (UNS A91100) wire wrapped around threaded rods of nylon, 1010 mild steel (UNS G10100 or G10080), and CA110 copper (UNS C11000). Atmospheric corrosivity is a function of the material that is corroding, however. The relative corrosivity of atmospheres could be quite different if a different combination of materials is chosen.