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What is the difference between ASTM D1735 and ASTM B117?

Abstract: 文章探讨了 ASTM D1735 和 ASTM B117 两种测试标准的区别。ASTM D1735 测试用于评估涂层在高冷凝潮湿条件下的防水性能，仅使用软化水，而 ASTM B117 则是通过盐雾测试来评估腐蚀情况。尽管两者测试方法相似，但 ASTM D1735 采用的条件较温和，不属于加速腐蚀测试。相反，ASTM B117 是一种加速腐蚀试验。此外，ASTM D1735 与 ASTM G85 相关，后者基于 ASTM B117，但更贴近实际腐蚀情况。

ASTM D1735 is also known as the Standard Practice for Testing the Water Resistance of Coatings Using Water Fog Apparatus. The ASTM D1735 test can help you determine how well a product coating will resist water resistance in high condensing humidity conditions.


While very similar to the ASTM B117 corrosion test, ASTM D1735 uses only demineralized water (water that does not contain sodium chloride). ASTM B117, on the other hand, uses salt spray testing when testing for corrosion. In some cases, exposure to water may be more harmful than exposure to sodium chloride solution, because the chloride ions may be too large to penetrate the coating's crystal lattice. The ASTM D1735 test is also closely related to the ASTM G85 test, which is based on ASTM B117, but in many cases produces results that more closely match field corrosion observations.


Also, ASTM B117 is considered an accelerated corrosion test. However, ASTM D1735 uses milder test conditions and cannot be considered an accelerated corrosion test.


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