1.1 本规范涵盖了在规定的流动条件下使用喷射冲击（JI）设备评估油田和炼油厂应用的腐蚀抑制剂的普遍接受的程序。 1.2 以SI单位表示的值将被视为标准值。本标准不包括其他计量单位。 1.3 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 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====== 5.1 油田和炼油厂应用缓蚀剂的选择涉及缓蚀剂在实验室的鉴定（见指南 G170 ).应在实验室中以快速且经济高效的方式模拟现场条件。 5.2 油田和炼油厂腐蚀抑制剂应在从停滞到典型生产条件下发现的一系列流动条件下提供保护。抑制剂并非在所有流动条件下都同样有效，因此确定它们有效的流动条件是重要的。 5.3 流体动力学条件的严重程度取决于实验室方法的类型。通常，旋转圆筒电极在高达20Pa的壁剪切应力下是有效的，旋转笼(RC)在20Pa和200Pa的壁剪切应力之间是有效的，并且射流冲击(JI)在高于200Pa的壁剪切应力下是有效的 ( 1 ) 3 壁剪应力。 5.4 JI测试系统相对便宜，使用简单的扁平试样。 5.5 在这种实践中，提出了一个通用程序，以使用JI模拟不同类型试样材料的影响来获得可重复的结果；抑制剂浓度；油、气体和盐水组合物；温度；压力；和流动。当流速非常高（通常高于500 Pa）或存在沙子或固体颗粒时，侵蚀效应占主导地位；然而，这种做法不包括侵蚀效应。

1.1 This practice covers a generally accepted procedure to use the jet impingement (JI) apparatus for evaluating corrosion inhibitors for oilfield and refinery applications in defined flow conditions. 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 Selection of corrosion inhibitor for oilfield and refinery applications involves qualification of corrosion inhibitors in the laboratory (see Guide G170 ). Field conditions should be simulated in the laboratory in a fast and cost-effective manner. 5.2 Oilfield and refinery corrosion inhibitors should provide protection over a range of flow conditions from stagnant to that found during typical production conditions. The inhibitors are not equally effective over all flow conditions, so it is important to determine the flow conditions in which they are effective. 5.3 Severity of hydrodynamic conditions depends on the type of laboratory methodology. Typically, rotating cylinder electrode is effective up to 20 Pa of wall shear stress, rotating cage (RC) is effective between 20 Pa and 200 Pa of wall shear stress, and jet impingement (JI) is effective at wall shear stress above 200 Pa ( 1 ) 3 of wall shear stress. 5.4 The JI test system is relatively inexpensive and uses simple flat specimens. 5.5 In this practice, a general procedure is presented to obtain reproducible results using JI simulating the effects of different types of coupon materials; inhibitor concentrations; oil, gas, and brine compositions; temperature; pressure; and flow. Erosive effects predominate when the flow rate is very high (typically above 500 Pa) or when sand or solid particles are present; however, this practice does not cover the erosive effects.