How to effectively avoid hot dip galvanized bolt rust？

Hot-dip galvanized bolts are used to protect a relatively good surface from rust, but in the face of natural weathering and corrosion, they also seem to rust. In order to avoid this phenomenon, the following measures should be taken.

First, we need to pack the hot dip galvanized bolt after galvanizing. Reasonable selection of packaging can effectively avoid rust and prolong the service life. For example, galvanized iron sheet is preferable and can be placed in a desiccant with appropriate humidity in the box to reduce the relative humidity, reduce compatibility and prevent the erosion of harmful gases in the warehouse.

In order to prevent the anti-corrosion treatment of non-standard screws, the anti-corrosion treatment is defatted, and anti-rust screws and nuts are used in the anti-rust agent tank, or zinc and chromium compounds are used to form a protective film on the metal surface, forming a spray method, then drying and cooling, and then repeat the process once.

Phosphate treatment is a phosphate chemical treatment in which metals are included on a metal surface to form a phosphate protective film. Phosphate treatment solution is insoluble in water and has excellent phosphate film adhesion. It is the primary use of substrates and coatings. The metal layer is used for cold adsorption of lubricants. Due to phosphate film consists of a series of different sizes of zinc, manganese, hydrogen phosphate salt and iron phosphate crystals, so the membrane is porous and has a larger specific surface area, good absorption, adsorption coating or a large number of lubricant, so it is often used as a primer or cold stamping in order to reduce the friction with steel, cold drawn steel wire of the lubricant layer.