When rust is found on stainless steel butt weld flange and pipe fittings, it shall be treated right away. We use the following methods: 

1. Chemical methods

Re-passivation of the rusted portion with a pickling paste or spray to form a chromium oxide film restores corrosion resistance. After pickling, it is important to properly rinse the water with all the contaminants and acid residues. After all treatment, it is re-polished with polishing equipment and sealed with polishing wax. For areas with slight rust, use a 1:1 mixture of gasoline and oil to wipe off the rust with a clean cloth.

2. mechanical methods

Sandblasting, blasting with glass or ceramic particles, annihilation, brushing and polishing. It is possible to mechanically remove the contamination caused by previously removed materials, polishing materials or annihilation materials. All kinds of pollution, especially foreign iron particles, can be a source of corrosion, especially in humid environments. Therefore, the mechanical cleaning surface should preferably be cleaned under dry conditions. The mechanical method can only be used to clean the surface and does not change the corrosion resistance of the material itself. It is therefore recommended to re-polish with a polishing device after mechanical cleaning and to seal with polishing wax.