1.1 本试验方法提供了一种评估金属涂层产品和试样可焊性的程序，以确保在需要使用软（锡铅）焊料和松香焊剂进行焊接的制造过程中具有令人满意的性能。本试验方法仅适用于测试通常易于焊接的涂层，如:锡、锡铅合金、银和金。 1.2 该试验方法具有定性和广泛适用性。它很容易执行，只需要简单的设备。 本测试方法未涵盖的其他可焊性测试更适用于特定情况，产生定量结果，或两者兼而有之。文献中描述了几种。 2. 这是一个“去不去”的测试，不将可焊性评定为优秀、良好、公平等。 1.3 本标准可能涉及危险材料、操作和设备。本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 为了在生产操作中简单快速地形成良好的焊点，熔化的焊料必须很容易润湿并扩散到被连接产品的表面上。 要做到这一点，表面必须是干净的，或者只被通过适当的焊剂容易去除的污染物弄脏。通常有必要使通量仅足以清除正常出现的土壤。更具侵蚀性的焊剂可能会腐蚀产品并产生其他有害影响。酒精中的未活化松香是本试验方法中使用的标准助焊剂；然而，为使用其他助熔剂作出了规定。由于松香是一种温和的助焊剂，在边缘情况下，它比活性更强的助焊剂能更好地区分可接受和不可接受的可焊性。 4.2 金属涂层经常用于提供可焊接的表面。但是，生产不当的涂层可能无法产生所需的可焊性。存在许多导致可焊性差的涂层缺陷，包括孔隙率、共沉积杂质、不正确的厚度和表面污染。对于每种不期望的条件，直接测试涂层可能是困难的或不切实际的。在这些情况下，测试可焊性。通过可焊性测试的产品有望在生产中令人满意地焊接。 如果未能通过测试，测试结果不会揭示可焊性不足的原因，但根据经验，操作员可能能够确定原因。 4.3 该测试方法测量使用未活化的松香助焊剂用Sn60Pb40或Sn63Pb37焊料焊接涂覆产品的能力。这种焊料和这种助焊剂，或其活化形式，通常用于电子产品的组装。 4.4 测试样品应为具有相同一般形状和质量的电子产品或物品的组件。 比这大得多的物品在焊料浸入过程中会加热得太慢。如果要测试更多的大块试样，则必须使用更长的浸泡时间，该时间由实验决定。 4.5 如果测试样品的长度超过25 mm，则其底端在焊料中的时间将明显长于规定时间。因此，如果试样长度超过25mm，则在试样底端获得的结果无效。在评估结果时，应将试样的这一部分打折扣。 第二组试验可在试样仅部分浸入的附加试样上进行。这些将用于评估底端。

1.1 This test method provides a procedure for evaluating the solderability of metallic-coated products and test specimens to assure satisfactory performance in manufacturing processes requiring soldering with soft (tin-lead) solder and rosin flux. This test method is applicable only for testing coatings that are normally readily solderable such as: tin, tin-lead alloy, silver, and gold. 1.2 This test method is qualitative and broadly applicable. It is easy to perform and requires only simple equipment. There are other solderability tests not covered by this test method that are more applicable to specific situations, yield quantitative results, or both. Several are described in the literature. 2 This is a “go-no-go” test and does not grade solderability as excellent, good, fair, and so forth. 1.3 This standard may involve hazardous materials, operations, and equipment. 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 ====== 4.1 In order that a sound solder joint be formed simply and quickly in a production operation, the molten solder must readily wet and spread over the surfaces of the products being joined. For this to happen, the surfaces must be clean or be soiled only with contaminants that are easily removed by an appropriate flux. It often is necessary that the flux be only strong enough to remove the normally occurring soils. A more aggressive flux may corrode the product and have other harmful effects. Nonactivated rosin in alcohol is the standard flux used in this test method; however, provision is made for the use of other fluxes. Since rosin is a mild flux, it provides better discrimination between acceptable and unacceptable solderability in marginal cases than do more active fluxes. 4.2 Metallic coatings are frequently used to provide solderable surfaces. But, an improperly produced coating may not yield the required solderability. There are many coating defects that cause poor solderability including porosity, codeposited impurities, incorrect thickness, and surface contamination. It may be difficult or impractical to test a coating directly for each of the undesirable conditions. In these instances solderability is tested. Products that pass the solderability test can be expected to solder satisfactorily in production. In the case of failure to pass the test, the test results will not reveal the cause of the inadequate solderability, though, with experience, an operator may be able to identify the cause. 4.3 This test method measures the ability of a coated product to be soldered with Sn60Pb40 or Sn63Pb37 solder using a nonactivated rosin flux. This solder and this flux, or an activated form of it, are generally used in the assembly of electronic products. 4.4 It is intended that the tested specimens be components of electronic products or articles with the same general shape and mass. Articles that are much more massive than this will heat up too slowly during the solder immersion. If more massive specimens are to be tested, a longer immersion time will have to be used, the time to be determined by experiment. 4.5 If the specimen tested is longer than 25 mm, its bottom end will be in the solder for significantly longer than the specified time. Therefore, if the specimen is longer than 25 mm, the results obtained at the bottom end of the specimen are invalid. This part of the specimen shall be discounted in the evaluation of the results. A second set of tests can be run on additional specimens in which the specimens are only partly immersed. These would be used to evaluate the bottom ends.