1.1 本试验方法涵盖了测量土壤电阻率的设备和程序，用于从地面移除的土壤样品，用于评估和控制埋地结构的腐蚀。 1.2 程序允许在现场或实验室中使用此测试方法。 1.3 试验方法程序适用于饱和条件下和收到条件下土壤样品的电阻率测量。 1.4 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。土壤电阻率值以欧姆-厘米为单位。 1.5 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制定适当的安全、健康和环境实践，并在使用前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====== 5.1 周围土壤环境的电阻率是地下结构腐蚀的一个因素。高电阻率土壤通常不像低电阻率土壤那样具有腐蚀性。土壤电阻率是影响地下结构使用寿命的众多因素之一。土壤电阻率可能会影响材料的选择和结构的位置。 5. 5.2 土壤电阻率在腐蚀过程中具有特别重要的意义，因为它是分析腐蚀问题和设计纠正措施的基础。 5.3 该测试方法的重点是提供准确、快速的土壤电阻率测量，以帮助确定土壤的腐蚀性。 试验方法 G57 强调 原位 测量通常用于埋地结构的腐蚀控制设计（阴极保护系统的地床设计等），但也包括关于四针土箱法的信息和程序。双电极土壤箱法是比四针土壤箱更准确和更快速的方法，并且经常补充四针， 原位 土壤电阻率法。 5.4 通过该试验方法确定的饱和土壤电阻率不一定表示最小土壤电阻率。

1.1 This test method covers the equipment and procedures for the measurement of soil resistivity, for soil samples removed from the ground, for use in the assessment and control of corrosion of buried structures. 1.2 Procedures allow for this test method to be used in the field or in the laboratory. 1.3 The test method procedures are for the resistivity measurement of soil samples in the saturated condition and in the as-received condition. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. Soil resistivity values are reported in ohm-centimeter. 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 to 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 resistivity of the surrounding soil environment is a factor in the corrosion of underground structures. High resistivity soils are generally not as corrosive as low resistivity soils. The resistivity of the soil is one of many factors that influence the service life of a buried structure. Soil resistivity may affect the material selection and the location of a structure. 5 5.2 Soil resistivity is of particular importance and interest in the corrosion process because it is basic in the analysis of corrosion problems and the design of corrective measures. 5.3 The test method is focused to provide an accurate, expeditious measurement of soil resistivity to assist in the determination of a soil’s corrosive nature. Test Method G57 emphasizes an in situ measurement commonly utilized in the design of a buried structures’ corrosion control (cathodic protection systems’ ground bed design, and so forth), but also includes information and procedures on a four-pin soil box method. The two-electrode soil box method is an accurate and more expeditious method than the four-pin soil box and often complements the four-pin, in situ soil resistivity method. 5.4 The saturated soil resistivity determined by this test method does not necessarily indicate the minimum soil resistivity.