We’ve all seen it, a low-lying cloud formation known as a marine layer coming onshore from the ocean. But what it consists of and actually represents is bad news for anything exposed to that corrosive environment and leads to a trillion dollars of costs associated with the impact of corrosion. Of course, this is only one factor of many, which create corrosion related issues for many companies around the world. But the issue remains, how to keep our customers product from failing within its warranty period. This is where corrosion testing comes into play.
One aspect in corrosion testing has been referred to as salt fog, salt spray or just plain corrosion testing and all would be correct but we prefer to call our equipment as Advanced Weathering Testing Equipment since this is really what it represents. A method of testing components that are exposed to outside elements such as UV light, rain, condensation and of course, salt fog exposure. And as we continue to gather greenhouse gasses into our atmosphere, the advent of acid rain is very prevalent in our everyday lives and this slightly acidic rain must be taken into consideration also for our everyday products as well.
In the world of standards compliance regarding salt fog testing, ASTM B117 represents the baseline criteria regarding testing procedures and practices involving salt spray/fog testing. This article will dive deeper into ASTM B117 and point out that not all “salt fog” chambers are created equal.
ASTM B117-11 is the latest edition of this worldwide standard and covers all baseline design parameters for anything related to salt fog corrosion testing. The relevancy of this 12 page document is apparent because it tells us how equipment should be built and why, details on solution preparation. So with that, allow me to point out the key parts of this standard and how Equilam North America builds equipment, which is 100% compliant to this standard.
Key Points in Salt Fog Design per ASTM B117-11
