ASTM B380-97 pdf free

04-17-2021 comment

ASTM B380-97 pdf free.Standard Test Method of Corrosion Testing of Decorative Electrodeposited Coatings by the Corrodkote Procedure.
The type and number of test specimensto be used,as well as the criteria for evaluation of the testresults,shall be defined in the specifications covering thematerial or product being tested,or shall be mutually agreedupon by the manufacturer and the purchaser.Metallic and metalliccoated specimens may be solvent cleaned before testing, usinga suitable solvent such as alcohol,ethyl ether,acetone orpetroleum ether. Solvents that are corrosive or will depositprotective films shall not be used.Apply the Corrodkote slurry to thespecimen using a clean paint brush. Dip the brush in theCorrodkote slurry and with a circular motion, completely coverthe specimen.Then smooth out the coating by brushing lightlyin one direction. Allow the specimens to dry at room tempera-ture and at a relative humidity less than 50 % for 1 h beforeplacing them in the humidity chamber. Should it be desirable tocut test specimens from parts or from preplated, or otherwisecoated steel sheet, the cut edges shall be protected by coatingthem with paint, wax, tape, or other effective media so that thedevelopment of a galvanic effect between such edges and theadjacent plated or otherwise coated-metal surfaces,is prevented.
Position of Specimens During Test-The position of thespecimens in the humidity chamber during the test is notcritical as long as they do not touch each other and the supportsdo not touch the test areas that have been coated with theCorrodkote slurry.The exposurezone of the humidity chamber shall be maintained at 38  2 ℃.The relative humidity of the exposure zone of the chambershall be maintained between 80 and 90 % shall not producecondensation on any of the parts.The period of each test cycle as well asthe number of test cycles required, shall be as specified in thespecifications for the material or product being tested, or asmutually agreed upon between the manufacturer and thepurchaser.
Treat the specimenafter each test cycle as outlined in 6.9.1.After the last test cycleand if the specimen is to be inspected between test cycles, treatthe specimens as outlined in 6.9.1 and 6.9.2.Remove the specimen from the humidity chamber.Clean the specimen using fresh running water and a piece ofclean cheesecloth or suitable synthetic sponge to remove all ofthe slurry. A mild abrasive such as a water paste of tripoli maybe used to remove any adhering materials.ASTM B380 pdf download.

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