Copper strip tarnish test

Test method for porosity in gold platings on metal substrates by gas exposures Test method for half-cell potentials of uncoated reinforcing steel in concrete Method for detection of copper corrosion from petroleum products by the copper strip tarnish test... 

Detection of Copper Corrosion from Petroleum Products by the Copper Strip Tarnish Test... 

Detection of Copper Corrosion from Petroleum Products by the Copper Strip Tarnish Test," Amer. Soc. for Test, and Mater., D130 (1976). 

Presence of small amounts of some sulfur compounds in certain refined products (gas and liquid) can have a corrosion effect on copper alloy components of users equipment that adversely affects their function. For example, copper corrosion products could cause plugging of metering and pilot valves. Consequently, product specifications may call for the product to pass a copper corrosion test such as ASTM D 1838, Test Method for Copper Strip Corrosion by Liquefied Petroleum (LP) Gases, or ASTM D 130, Test Method for Detection of Copper Corrosion from Petroleum Products by the Copper Strip Tarnish Test, or ASTM D 4048, Test Method for Detection of Copper Corrosion from Lubricating Grease. 

Standard Test Method for Mercurous Nitrate Test for Copper and Copper Alloys Standard Specification for Cellulosic Fiber (Wood-Base) Loose-Fill Thermal Insulation Standard Test Method for Half-CeU Potentials of Uncoated Reinforcing Steel in Concrete Standard Test Method for Detection of Copper Corrosion from Petroleum Products by the Copper Strip Tarnish Test... 

D-130, IP 112, IP 154, IP 411). The pure sheet copper (3.0" x 0.5775 x 12 mm) is placed in a test tube with 40 ml of the sample, so that the copper is completely immersed. The tube is closed with a vented cork and heated in a boiling-water bath for 3h. The copper strip is then compared visually with a new strip of copper for signs of tarnish. The results are recorded as ... 

ASTM Copper Strip Corrosion Standards consist of reproductions in color of typical test strips representing increasing degrees of tarnish and corrosion, the reproductions being encased in plastic in the form of a plaque. 

Compare the exposed strip with the ASTM Copper Strip Corrosion Standards described in 6.5. Hold the test strip and the Standard in such a manner that light reflected from them at an angle of approximately 45 will be observed. Report as passing strips shown in the Slight Tarnish cau ory or better A or IR) all others shall be considered ilures. 

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