Acid-pickling-free hot galvanizing process

Abstract

The invention relates to the field of hot galvanizing, and discloses an acid-pickling free hot galvanizing process. A hot galvanizing acid-pickling-free technology modification project is adopted, themodification scheme is mainly characterized in that an original acid pickling process is abandoned, one original set of rinsing bath is changed into a plating assisting bath, two sets of plating assisting baths are newly added, and three sets of plating assisting baths are formed; according to the production process, twice shot blasting is added, the shot blasting quality is improved, and the galvanizing quality is ensured; the acid-pickling-free plating assisting process is adopted, so that acid gas is not generated, and disordered exhaust gas generated through feeding dust of a plating assisting agent and volatilizing waste gas of an additive and the like can be discharged directly and disorderly as long as reducing the falling of materials, enhancing the ventilation, and strengtheningthe management measures; the waste water is not newly added by adopting a plating-assisting mode, the environment quality is greatly improved, a good working environment is created for workers, the environment is protected, and the standard is achieved.

Description

technical field [0001] The invention relates to the field of hot-dip galvanizing, and more specifically relates to a pickling-free hot-dip galvanizing process. Background technique [0002] Hot-dip galvanizing (galvanizing) is also called hot-dip galvanizing and hot-dip galvanizing: it is an effective metal anti-corrosion method, mainly used for metal parts and structural facilities in various industries. It is to immerse the rust-removed steel parts in the zinc liquid at a certain temperature, so that the surface of the steel parts will adhere to the zinc layer, so as to achieve the purpose of anti-corrosion. Shot blasting is also the name of a mechanical surface treatment process, similar processes include sandblasting and shot peening. Shot blasting is a cold treatment process. Shot blasting, as the name implies, is to remove impurities such as surface scale and improve appearance quality. The original process is a pickling process before hot-dip galvanizing. Only one s...

Images