The reasons for fogging phenomenon in alkaline galvanizing process mainly include: Incomplete pre-treatment of the workpiece: the oil and oxide on the surface of the workpiece are not thoroughly removed, affecting the uniformity and brightness of the plating layer.
Author: Anna
The reasons for fogging phenomenon in alkaline galvanizing process mainly include:
Incomplete pre-treatment of the workpiece: the oil and oxide on the surface of the workpiece are not thoroughly removed, affecting the uniformity and brightness of the plating layer.
More metal impurities in the plating solution: including the accumulation of zinc ions and other metal ions, affecting the purity of the plating solution and the quality of the coating.
Too high temperature of the plating solution: too high temperature may lead to unstable chemical composition in the plating solution, affecting the quality of the plated layer.
Poor post-treatment: Including incomplete cleaning or improper passivation treatment, resulting in residual impurities or incompletely neutralized alkaline substances on the surface of the workpiece.
Plating solution contamination: the presence of contaminants such as grease, metal ion impurities, etc. affects the brightness and uniformity of the plated layer.
Inadequate mechanical mixing or filtration: resulting in uneven distribution of the brightening agent in the plating solution, impurities can not be removed in time, affecting the uniformity and brightness of the plating.
Improper use of additives: excessive or insufficient additives may lead to a decline in the quality of the plating layer, such as too much additives may lead to excessive organic inclusion in the plating layer, affecting the gloss of the plating layer.
Methods to solve the problem of alkaline galvanizing fogging include:
Enhance workpiece pre-treatment: Ensure that the workpiece surface is clean and free of oil and oxides.
Regular cleaning of the plating solution: Filter and replace the plating solution on a regular basis to reduce the accumulation of metal impurities and contaminants.
Control the plating solution temperature: Keep it within the proper temperature range and avoid over or under temperature.
Optimize post-treatment: Ensure thorough cleaning and passivation to avoid residual impurities.
Adjust mechanical agitation and filtration: Ensure that the agitation and filtration systems are running well and maintain the uniformity of the plating solution.
Reasonable use of additives: Adjust the use of additives according to process requirements to avoid over or under use.
Monitoring plating parameters: check and adjust the current density, pH value and other parameters regularly to ensure the stability of the plating process.
Through the comprehensive application of the above measures, the fogging phenomenon in alkaline galvanizing process can be effectively reduced or avoided, and the quality and brightness of the plating layer can be improved.