Second, if the surface of the staircase fittings with other metal powder, especially in the wet case, those small substances and stainless steel condensate combined, there will be electrochemical reaction, will seriously damage the surface of the material, Corrosion occurs. If the stainless steel material with adhesives, such as some juice, soup or organic juice, and oxygen in the water combined with organic acids will be formed, it will cause damage to the stainless steel.