ASTM C1617-15
金属水腐蚀热绝缘材料中浸出的含离子萃取溶液的定量加速实验室评估的标准实践规程

Standard Practice for Quantitative Accelerated Laboratory Evaluation of Extraction Solutions Containing Ions Leached from Thermal Insulation on Aqueous Corrosion of Metals

被代替

标准号

ASTM C1617-15

发布

2015年

发布单位

美国材料与试验协会

替代标准

ASTM C1617-18

当前最新

ASTM C1617-19

 

 

引用标准

ASTM A105/A105M ASTM A53/A53M ASTM C168 ASTM C518 ASTM C665 ASTM C692 ASTM C739 ASTM C795 ASTM C871 ASTM D609 ASTM G1 ASTM G16 ASTM G31 ASTM G46

适用范围

5.1 Corrosion associated with insulation is an important concern for insulation manufacturers, specification writers, designers, contractors, users and operators of the equipment. Some material specifications contain test methods (or reference test methods contained in other material specifications), for use in evaluating the insulation with regard to the corrosion of steel, copper, and aluminum. In some cases these tests are not applicable or effective and have not been evaluated for precision and bias.

5.2 A properly selected, installed, and maintained insulation system will reduce the corrosion that often occurs on an un-insulated structure. However, when the protective weather-resistant covering of an insulation system fails, the conditions for the aqueous environment necessary for corrosion under insulation (CUI) often develop. It is possible the insulation contains, collects, or concentrates corrosive agents, or a combination thereof, often found in industrial and coastal environments. If water is not present, these electrolytes cannot migrate to the metal surface. The electrochemical reaction resulting in the aqueous corrosion of metal surfaces cannot take place in the absence of water and electrolytes. Additional environmental factors contributing to increased corrosion rates are oxygen, and elevated-temperature (near boiling point).

5.3 Chlorides and other corrosive ions are common to many environments. The primary corrosion preventative is to protect insulation and metal from contamination and moisture. Insulation covers, jackets, and metal coating of various kinds are often used to prevent water infiltration and contact with the metal.

5.4 This procedure can be used to evaluate all types of thermal insulation and fireproofing materials (industrial, commercial, residential, cryogenic, fire-resistive, insulating cement) manufactured using inorganic or organic materials, faced or unfaced, for which a filtered extraction solution can be obtained.

5.5 This procedure can be used with all metal types for which a coupon can be prepared such as mild steel, stainless steel, copper, or aluminum.

5.6 This procedure can also be applicable to insulation accessories including jacketing, covers, adhesives, cements, and binders associated with insulation and insulation products.

5.7 Heat treatment of the insulation (as recommended by the manufacturer up to the maximum potential exposure temperature) can be used to simulate possible conditions of use.

5.8 Adhesives can be tested by first drying followed by water extraction or by applying a known quantity of the test adhesive to a test piece of insulation and then extracting.

5.9 Insulating cements can be tested by casting a slab, drying, and extracting or by using the uncured insulating cement powder for extraction.

5.10 Reference tests prepared with various concentrations of solutions that are conducive to the corrosion of the tested metal serve as comparative st......

在线测定贵金属矿废水中氰化物

当铜存在时，用于浸金的过程控制，滴定法并不能准确评估游离氰化物的含量。其他反应产物,如硫氰酸盐，硝酸盐，亚硝酸盐，氨，亚硫酸盐会干扰大多数氰化物分析方法。OI公司的CN Solution 9310在线氰化物分析仪，根据美国EPA方法OIA-1677和ASTM D 6888-09，专注于检测贵金属浸出液中的游离氰化物。气膜扩散安培检测技术已被证实免于贵金属浸出液中的铜和金属硫化物的干扰。...