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ASTM F519-2008 电镀/涂层处理和设备环境的机械氢脆化评价的标准试验方法

ASTM F519-2008 电镀/涂层处理和设备环境的机械氢脆化评价的标准试验方法

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【英文标准名称】: Standard Test Method for Mechanical Hydrogen Embrittlement Evaluation of Plating/Coating Processes and Service Environments
【原文标准名称】: 电镀/涂层处理和设备环境的机械氢脆化评价的标准试验方法
【标准号】: ASTM F519-2008
【标准状态】: 现行
【国别】: 美国
【发布日期】: 2008
【实施或试行日期】:
【发布单位】: 美国材料与试验协会(US-ASTM)
【起草单位】: F07.04
【标准类型】: (Test Method)
【标准水平】: ()
【中文主题词】:
【英文主题词】: cleaner; coating; delayed failure; fluids; hydrogen embrittlement; maintenance chemicals; plating/coating; steel; stress cracking; threshold; Aircraft chemicals/processes; Delayed failure; Electrodeposited coatings; Electroplated coatings; Electroplated s
【摘要】: Plating/coating Processes8212;This test method provides a means by which to detect possible hydrogen embrittlement of steel parts during manufacture by verifying strict controls during production operations such as surface preparation, pretreatments, and plating/coating. It is also intended to be used as a qualification test for new plating/coating processes and as a periodic inspection audit for the control of a plating/coating process. Service Environment8212;This test method provides a means by which to detect possible hydrogen embrittlement of steel parts (plated/coated or bare) due to contact with chemicals during manufacturing, overhaul and service life. The details of testing in a service environment are found in Annex A5.1.1 This test method describes mechanical test methods and defines acceptance criteria for coating and plating processes that can cause hydrogen embrittlement in steels. Subsequent exposure to chemicals encountered in service environments, such as fluids, cleaning treatments or maintenance chemicals that come in contact with the plated/coated or bare surface of the steel, can also be evaluated. 1.2 This test method is not intended to measure the relative susceptibility of different steels. The relative susceptibility of different materials to hydrogen embrittlement may be determined in accordance with Test Method F 1459 and Test Method F 1624. 1.3 This test method specifies the use of air melted AISI E4340 steel per SAE AMS-S-5000 (formerly MIL-S-5000) heat treated to 260 x2013; 280 ksi (pounds per square inch x 1000) as the baseline. This combination of alloy and heat treat level has been used for many years and a large database has been accumulated in the aerospace industry on its specific response to exposure to a wide variety of maintenance chemicals, or electroplated coatings, or both. Components with ultimate strengths higher than 260 x2013; 280 ksi may not be represented by the baseline. In such cases, the cognizant engineering authority shall determine the need for manufacturing specimens from the specific material and heat treat condition of the component. Deviations from the baseline shall be reported as required by section 12.1.2. The sensitivity to hydrogen embrittlement shall be demonstrated for each lot of specimens as specified in section 9.5. 1.4 Test procedures and acceptance requirements are specified for seven specimens of different sizes, geometries, and loading configurations. 1.5 Pass/Fail Requirements8212;For plating/coating processes, specimens must meet or exceed 200 h using a sustained load test (SLT) at the levels shown in Table 1. 1.5.1 The loading conditions and pass/fail requirements for service environments are specified in Annex A5. 1.5.2 If approved by the cognizant engineering authority, a quantitative, accelerated (x2264; 24 h) incremental step-load (ISL) test as defined in Annex A3 may be used as an alternative to SLT. 1.6 This test method is divided into two parts. The first part gives general information concerning requirements for hydrogen embrittlement testing. The second is composed of annexes that give specific requirements for the various loading and specimen configurations covered by this test method (see section 9.1 for a list of types) and the details for testing service environments. 1.7 The values stated in the foot-pound-second (fps) system in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to......
【中国标准分类号】: A29
【国际标准分类号】: 25_220_40
【页数】: 18P.;A4
【正文语种】: 英语

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