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Salt Spray Corrosion Testing -
Historical Items: The basic salt spray test reportedly dates back to 1914, with roots in the National Bureau of Standards (NBS) in the United States (now known as NIST). The neutral salt spray procedure was formalized as an ASTM B117 specification in 1939. (ASTM itself was founded in 1898.) This specification reportedly changed considerably in the early years, compared with its present form. Concerning the early years of changes, Thomas Doppke has commented: "Even the salt concentration varied from 20% to as low as 3.5%." F.D. Timmins reportedly was one of the pioneers in shifting salt spray tests away from the simplistic ASTM B117 approach, to accelerated cyclical (wet/dry) testing. The solution used in the ASTM G85 Annex A5 and ASTM D5894 cyclical test procedures is still referred to as "Timmins solution". References/Literature: T. Doppke: "Fastener Fits and Finishes", Automotive Finishing (On line), Fall 1998. F.D. Timmins: "Avoiding Paint Failures by Prohesion", JOCCA, Vol.62, No.4, 1970, pp.131-135. "Which Accelerated Test is Best", Problem Solving Forum, JPCL, August 2000, pp.17-28. (comments by various experts)
Corrosion Testing Module in corrosion-club.com Characteristics of ASTM B117 - Standard Practice for Operating Salt Spray (Fog) Apparatus
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