1.1 本指南给出了用于检查金属和无机涂层是否符合ASTM标准规范的抽样计划。 1.2 除另有说明外，本指南中的计划是从MIL-STD-105D的一些单次抽样计划中选择的。选定的具体计划见 表1- 3. 本指南的。的计划 表4 ，用于破坏性测试，不符合军用标准。当供应商的质量历史不符合要求时，本标准不包含军事标准对严格检查的要求。 1.3 计划基于属性检查，即对产品进行检查，并将其归类为符合要求或不合格。 指南中给出了基于变量检验的抽样计划 B762型 . 当测试产生特性的数值时，当规范对特性施加数值限制时，以及当满足某些统计标准时，变量计划适用。这些在指南中进行了解释 B762型 . 1.4 本指南中的计划通常适用。在某些情况下，可能需要更严格或更宽松的计划或更具歧视性的计划。指南中给出了可能满足这些需求的其他计划 B697 . 还有，指南 B697 描述了属性抽样计划的性质以及在选择抽样计划时必须考虑的几个因素。MIL中提供了更多信息和更多计划选择- STD-105D，MIL-STD-414，ANSI/ASQC Z1.9-1979，参考文献 ( 1- 7. ) 2. ，并在指南中 B697 . 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====== 4.1 抽样检查允许通过检查从一组产品中抽取的数量相对较少的产品项目来估计一组产品的整体质量。 4.2 抽样方案的选择为买方和卖方提供了一种确定被认为令人满意的最低质量水平的方法。 4.3 由于抽样计划只会产生产品质量的估计，因此检查结果会有误差。通过使用抽样计划，了解并控制错误风险。

1.1 This guide gives sampling plans that are intended for use in the inspection of metallic and inorganic coatings for conformance to ASTM standard specifications. 1.2 The plans in this guide, except as noted, have been selected from some of the single sampling plans of MIL-STD-105D. The specific plans selected are identified in Tables 1- 3 of this guide. The plan of Table 4 , which is used for destructive testing, is not from the Military Standard. This standard does not contain the Military Standard's requirement for tightened inspection when the quality history of a supplier is unsatisfactory. 1.3 The plans are based on inspection by attributes, that is, an article of product is inspected and is classified as either conforming to a requirement placed on it, or as nonconforming. Sampling plans based on inspection by variables are given in Guide B762 . Variables plans are applicable when a test yields a numerical value for a characteristic, when the specification imposes a numerical limit on the characteristic, and when certain statistical criteria are met. These are explained in Guide B762 . 1.4 The plans in this guide are intended to be generally suitable. There may be instances in which tighter or looser plans or ones that are more discriminating are desired. Additional plans that may serve these needs are given in Guide B697 . Also, Guide B697 describes the nature of attribute sampling plans and the several factors that must be considered in the selection of a sampling plan. More information and an even greater selection of plans are given in MIL-STD-105D, MIL-STD-414, ANSI/ASQC Z1.9-1979, Refs ( 1- 7 ) 2 , and in Guide B697 . 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 ====== 4.1 Sampling inspection permits the estimation of the overall quality of a group of product articles through the inspection of a relatively small number of product items drawn from the group. 4.2 The selection of a sampling plan provides purchasers and sellers a means of identifying the minimum quality levels that are considered to be satisfactory. 4.3 Because sampling plans will only yield estimates of the quality of a product, the results of the inspection are subject to error. Through the use of sampling plans, the risk of error is known and controlled.