For the advantage of the anti-rust and the lightweight, aluminum trailer chassis frames are more and more popular now. For manufacturing, the most important key is the surface treatment for it.
Whether the raw material corroded or not in the saltwater?
If aluminum is completely immersed in saltwater, oxygen-absorbing corrosion will also occur, that is, aluminum reacts with oxygen dissolved in water. In addition, a small number of cl-ions in saltwater can also corrode aluminum.
If it is to be converted between saltwater and land, it is also easy to be corroded.
How to solve it?
Insulation is the answer. Under normal circumstances, paint or powder coat on the surface is necessary.
Why are there still problems after surface treatment?
Details decide the success. Adhesion is the basis of surface treatment. You can choose to do anodizing treatment first, or do sandblasting first, and then do the powder coat. Some even add a layer of clear coat to the surface as double protection. It depends on the specific product.