The E-Track # E19146 that you referenced is galvanized to resist corrosion.
I attached an install video for this product for you to check out also. view full answer...
I did some research online to find out what metals when in contact with each other promote corrosion. Surprisingly, zinc coated steel, like the E-Track Cargo Control track, part # E19148, and aluminum like your trailer would not promote corrosion nearly as fast as most metals when attached to one another per the nobility of metals chart I found online.
As with any metals, the environment plays a major role in the corrosion between metals. If the materials are subjected to a lot of salt... view full answer...
The Erickson E-Track Tie Down Ring # 59147 have a 6,000 lb capacity and a 2,000 lb safe working load limit. The part is made in China to US specified standards and the company is located in Michigan. view full answer...