11/15/2022 0 Comments Din en iso 12944 part 6![]() ![]() ![]() ![]() The length of exposure is dependent upon the corrosivity category of C1 – C5-I or C5-M. Test panels are exposed to water condensation, salt spray, and in some cases, 168 hours of chemical spot testing consisting of 10% Sodium Hydroxide, 10% Sulfuric Acid, and 18% Mineral Spirits. This standard is an improvement over ASTM B-117 and ISO-9227 because it is a cyclic test. Published in 1998, ISO-12944-6 is a standard originally developed to evaluate corrosion protection of steel structures. Although it is also a widely accepted test, it suffers from the same fault found in ASTM-B117 – it does not mimic real world conditions. Like ASTM B-117, in the ISO-9227 test is a continuous test in which the testing atmosphere doesn’t change. standard, while ISO-9227 is recognized nearly worldwide. The biggest difference between the two tests is that ASTM B-117 is a U.S. ISO-9227 is nearly identical to ASTM B-117. Although ASTM B-117 remains a commonly used test, its major fault is that there is limited correlation to a real-world environment in which weather conditions fluctuate. ASTM B-117 is a non-cyclic test, which means that the surface is continually exposed to “salt air.” In this test, the panels are exposed at a 15 to 30 degree angle from vertical to continuous deposition of an atomized 5% NaCl (sodium chloride or salt) solution at 35 degrees Celsius and 97% humidity. For years, it was considered to be the gold standard is corrosion testing. Originally developed in 1939, ASTM B-117 was the first internationally recognized salt spray standard. These testing processes have evolved over the years as various organizations have tried to provide the most accurate information to engineers, manufacturers, and businesses that need to protect their HVAC/R investment. ICS 87.020 91.080.10 Descriptors: Paint coatings, corrosion protection, structural steelwork.There are several tests that can be used to measure the effectiveness of protective coatings for HVAC/R coils. Corrosion protection of steel structures by protective paint systems Part 1: General introduction (ISO 12944-1 : 1998) English version of DIN EN ISO 12944-1 ![]()
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