How to clean the rust on the surface of the single-head tube

1. In the process of handling, it is best to scrub with a slab brush several times. After the oxygenized skin on the surface is completely removed, rinse it with clean water (quick lime water or alkaline water is better) to avoid returning rust.

2. Use spray or pickling paste to help re-passivate the rusted parts to form a chromium oxide film, so that it can regain its corrosion resistance. For parts with slight rust spots, you can also use a 1:1 gasoline and engine oil mixture to wipe off the rust spots with a clean cloth. After pickling, in order to remove all contaminants and acid residues, it is very important to rinse with clean water.