Hot-dip galvanized bolts are a relatively good rust-proof surface, but in the face of nature's weathering corrosion is also the phenomenon of rust, in order to avoid this phenomenon, the main will also take the following aspects of the measures.
First of all, we have to package the hot-dip galvanized bolts after galvanizing. Reasonable choice of packaging can effectively avoid rust and extend the life of the use. Such as galvanized iron sheet metal is the best, in the box can be placed in the right amount of humidity desiccant to reduce the relative humidity compatible with reduce and prevent the erosion of harmful gases in the warehouse.
To prevent non-standard screw corrosion treatment is already degreasing and rust inhibitor in the rust removal tank rustproof screw nut swimming, or use the zinc and chromium compounds on the metal surface to form a protective film, form a spray method, and dry, cool, and then repeat the process once.
Phosphate treatment is a phosphate chemical treatment containing metal to metal surface to form a phosphate protective film phosphate treatment solution, insoluble in water, and has excellent phosphate film tightness, as its main purpose of the bottom layer and coating cold adsorption lubricant metal layer. Because the phosphate coating is composed of a series of zinc, manganese, hydrogen phosphate and iron phosphate crystals of different sizes, so the film is porous, large specific surface area, has good absorption, adsorption of coatings or a large number of lubricants, so it is often used as the bottom layer of coatings, or cold stamping to reduce friction and steel, cold drawn steel wire lubrication layer.