Meaning of neutral salt spray test


Test specimens are placed in an enclosed chamber and exposed to a continuous indirect spray of neutral (pH 6.5 to 7.2) salt water solution, which falls-out on to the specimens at a rate of 1.0 to 2.0ml/80cm²/hour, in a chamber temperature of +35C. The salt spray test basis is ASTM B117 [link by ed. to spec at TechStreet], 96 hours no white rust or red rust. The test was passed, but customer refused to accept the parts because they found 1 black spot on a sampled part. Specifically, the discussion will concentrate on the salt spray or salt fog test. Both terms, spray and fog, are used to describe the same test procedure, and are used interchangeably when describing and discussing this test. Accelerated Corrosion Testing The purpose of an accelerated corrosion test, such as the salt spray test, is to duplicate ... The salt spray tests are particularly useful for detecting discontinuities, such as pores and other defects, in certain metallic, organic, anodic oxide and conversion coatings. The neutral salt spray (NSS) test particularly applies to - metals and their alloys, - metallic coatings (anodic and cathodic), - conversion coatings, Test specimens are placed in an enclosed chamber and exposed to a continuous indirect spray of neutral (pH 6.5 to 7.2) salt water solution, which falls-out on to the specimens at a rate of 1.0 to 2.0ml/80cm²/hour, in a chamber temperature of +35C. Home » Services » Testing Services » Salt Spray Testing. In the research and development of materials prone to corrosion, salt fog testing, more commonly referred to as salt spray testing, helps determine the resistance of material to corrosion in extreme conditions such as the coastal environments or on roadways where de-icing involves salt.