The product is a series of combinations of several new multifunctional geminized non-ionic surfactants, which can significantly reduce the surface tension of aqueous solution, and has good hydrophilic, lipophilic, foaming and biodegradability. It is used in the pickling process of metal surface treatment industry. It has superior functions of fog suppression, corrosion inhibition, complexation, dispersion, penetration, cleaning aid, promotion and hydrogen embrittlement prevention; It can effectively decompose and control the rapid polymerization of ferrous ions to modify them; Enhance the penetration of oxides on the material surface and protect the matrix from corrosion; It can improve the utilization rate and treatment effect of acid and reduce the production cost. It is an ideal pickling additive.
The successful application of this product is the first at home and abroad. It passed the scientific and technological achievement appraisal of Jiangsu Machinery Industry Association on July 25, 2020. The appraisal number is sjxjz [2020] No. 98
The additive has the following functions:
Firstly, hydrochloric acid or sulfuric acid is converted into harmless acid washing solution, and no gas escapes during acid washing;
2. Protect the metal from pickling and hydrogen embrittlement;
3 it can effectively decompose and control the rapid polymerization of ferrous ions;
4. Improve the utilization rate of acid, ensure the service life of acid and enhance the pickling efficiency;
5. After pickling, a little corrosion inhibitor acid is attached to the surface of the workpiece to form a protective film, which avoids secondary oxidation within a certain time;
6. A large amount of ferrous chloride will not be dissolved into the tank liquid, so as to avoid the inability of pickling due to iron ion saturation, waste of residual acid and loss caused by discharging waste acid and additives at the same time;
7. Acid can be saved by about 30% in general.
8 reduce hazardous waste
The content of hydrochloric acid shall be supplemented in time during production, so that the acid concentration of the tank liquid is not less than 13%. Otherwise, the combination and dissolution of iron ions will be accelerated, and the content of iron ions in the tank liquid will be greatly increased, resulting in the failure of corrosion inhibitor acid and affecting the pickling speed and quality. Before adding acid, add additives according to 1.5% of the estimated volume of acid supplement. Every one to two years of pickling, a small amount of sediment shall be cleaned according to the amount of bottom slag deposited in the tank.
