Laboratory immersion corrosion testing

Factors may throw off these rates—these are outlined in ASTM G3I, Standard Practice for Laboratory Immersion Corrosion Testing of Metals. Coupon-type tests cannot be correlated with changing plant conditions that may dramaticahy affect process equipment lifetimes. Other methods must be used if more frequent measurements are desired or correlation with plant conditions are necessary. 

Practice for making and using U-bend stress corrosion test specimens Recommended practice for laboratory immersion corrosion testing of metals Method for vibratory cavitation erosion test Practice for recording data from atmospheric corrosion tests of metallic-coated steel specimens... 

G31-72, Standard practice for laboratory immersion corrosion testing of metals. Annual Book of ASTM Standards, ASTM International, Philadelphia, Pa., 2000, p. 99, Vol. 3.02. 

ASTM G31-72 (1985) Standard Practice for Laboratory Immersion Corrosion Testing of Metals. 

ASTM G 31, Practice for Laboratory Immersion Corrosion Testing of Metals—This method describes typical test vessels, metal specimens (coupons), process controls, aeration techniques, coupon placement and supports, exposure times, and corrosion rate calculations. 

ASTM G 31 Standard Practice for Laboratory Immersion Corrosion Testing of Metals Describes procedures for conducting laboratoiy weight loss tests Provides information on reporting and factors to be aware of. 

Exposure of coupons to the solution of interest with posttest evaluation according to accepted standards, such as ASTM G 31, Practice for Laboratory Immersion Corrosion Testing of Metals, is the most directly applicable method of testing in organic liquids. Because of the general lack of data on corrosion in organic liquids, coupon testing often... 

ASTM Designation G31. Annual Book of Standards, Vol. 03, 02. Laboratory Immersion Corrosion Testing of Metals. (American Society for Testing of Materials, 2001)... 

The basic in vitro tests derived from teehnieal applications are the salt spray test (ASTM B-117) and the submersion test, performed in saline solutions (3.5% NaCl, ASTM G31-72 (2004) Standard Practice for Laboratory Immersion Corrosion Testing of Metals). Both tests are conducted at room temperature. By such tests the mass loss ean be determined according to equation (10.5). The mass loss is calculated after removing the corrosion products with chromic acid, which at the same time removes the corrosion products and inhibits further corrosion (Forking, 1964), which is suitable for technical applications but may raise problems in biological environments. 

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