ASTM G189-07(2013)
实验室模拟绝缘腐蚀状态的标准指南
Standard Guide for Laboratory Simulation of Corrosion Under Insulation
ASTM G189-07(2013) 发布历史
ASTM G189-07(2013)由美国材料与试验协会 US-ASTM 发布于 2007。
ASTM G189-07(2013) 在中国标准分类中归属于: N04 基础标准与通用方法。
ASTM G189-07(2013) 实验室模拟绝缘腐蚀状态的标准指南的最新版本是哪一版？
最新版本是 ASTM G189-07(2021)e1 。
ASTM G189-07(2013) 发布之时，引用了标准
- ASTM A106/A106M 高温用无缝碳钢管标准规范
- ASTM C552 多孔玻璃隔热材料的标准规范
- ASTM C871 隔热材料可浸出氯离子,氟离子,硫酸根离子和钠离子化学分析的标准试验方法
- ASTM D1193 试剂水(联邦试验方法No.7916)
- ASTM G1 制备“清洁”和评估腐蚀试样的标准实施规程
- ASTM G102 计算电化学测量的腐蚀速率和相关信息的标准实施规程
- ASTM G15 有关腐蚀及腐蚀试验的标准术语
- ASTM G3 腐蚀检验中使用的电化测量的常规方法标准实施规程
- ASTM G31 金属的实验室浸渍腐蚀试验
- ASTM G46 点蚀检验和评定的标准指南
- ASTM G5 制定恒电位和动电位阳极极化测量值的标准参考试验方法
- ASTM G59 动电势极化电阻测量的标准试验方法
ASTM G189-07(2013)的历代版本如下：
- 2021年 ASTM G189-07(2021)e1 绝缘腐蚀实验室模拟标准指南
- 2007年 ASTM G189-07(2013) 实验室模拟绝缘腐蚀状态的标准指南
- 2007年 ASTM G189-07 实验室模拟绝缘腐蚀状态的标准指南
5.1 The corrosion observed on steel and other materials under thermal insulation is of great concern for many industries including chemical processing, petroleum refining and electric power generation. In most cases, insulation is utilized on piping and vessels to maintain the temperatures of the operating systems for process stabilization and energy conservation. However, these situations can also provide the prerequisites for the occurrence of general or localized corrosion, or both, and in stainless steels, stress corrosion cracking. For example, combined with elevated temperatures, CUI can sometimes result in aqueous corrosion rates for steel that are greater than those found in conventional immersion tests conducted in either open or closed systems (see Fig. 1).4 This figure shows actual CUI data determined in the field compared with the corrosion data from fully immersed corrosion coupons tests.
Note 1—The actual CUI corrosion rates can be in excess of the those obtain in conventional laboratory immersion exposures.5.2 This guide provides a technical basis for laboratory simulation of many of the manifestations of CUI. This is an area where there has been a need for better simulation techniques, but until recently, has eluded many investigators. Much of the available experimental data is based on field and in-plant measurements of remaining wall thickness. Laboratory studies have generally been limited to simple immersion tests for the corrosivity of leachants from thermal insulation on corrosion coupons using techniques similar to those given in Practice G31. The field and inplant tests give an indication of corrosion after the fact and can not be easily utilized for experimental purposes. The use of coupons in laboratory immersion tests can give a general indication of corrosion tendencies. However, in some cases, these procedures are useful in ranking insulative materials in terms of their tendencies to leach corrosive species. However, this immersion technique does not always present an accurate representation of the actual CUI tendencies experienced in the service due to differences in exposure geometry, temperature, cyclic temperatures, or wet/dry conditions in the plant and field environments.
5.3 One of the special aspects of the apparatus and methodologies contained herein are their capabilities to accommodate several aspects critical to successful simulation of the CUI exposure condition. These are: (1) an idealized annular geometry between piping and surrounding thermal insulation, (2) internal heating to produce a hot-wall surface on which CUI can be quantified, (3) introduction of ionic solutions into the annular cavity between the piping and thermal insulation, (4) control of the temperature to produce either isothermal or cyclic temperature conditions, and (5) control of the delivery of the control or solution to produce wet or wet-dry conditions. Other simpler methods can be used to run corrosion evaluations on specimens imme............
- 标准号
- ASTM G189-07(2013)
- 发布
- 2007年
- 发布单位
- 美国材料与试验协会
- 替代标准
- ASTM G189-07(2021)e1
- 当前最新
- ASTM G189-07(2021)e1
- 引用标准
- ASTM A106/A106M ASTM C552 ASTM C871 ASTM D1193 ASTM G1 ASTM G102 ASTM G15 ASTM G3 ASTM G31 ASTM G46 ASTM G5 ASTM G59