Electrolytic degreasing is a crucial step in the electroplating process, aiming at removing the oil on the surface of the workpiece and ensuring the uniform adhesion of the subsequent plating layer. However, alloy workpieces always have problems such as discoloration and corrosion after degreasing, which causes problems for many plating engineers. To address this situation, this paper analyzes this phenomenon and provides effective solutions.
I. Role and selection of electrolytic degreasing powder
Electrolytic degreasing powder is a combination of alkaline substances, surfactants and additives, which mainly cleans oil and oxides on the surface of the workpiece by electrochemical reaction. Choosing the right degreasing powder is crucial. Different compositions and ratios of degreasing powder have different effects on the alloy material. The right degreasing powder not only effectively cleans the surface, but also minimizes erosion of the alloy substrate.
II. Causes of discoloration and corrosion of alloy workpieces
1. Inappropriate composition of degreasing powder
Some electrolytic degreasing powders contain excessively strong alkaline components that react with the alloy substrate during the degreasing process, resulting in surface discoloration or corrosion.
2. Inadequate control of process parameters
Improper process parameters such as current density, temperature and time in the electrolytic release oil may also lead to corrosion and discoloration of alloy workpieces. Excessive current density and temperature, for example, accelerate the electrochemical reaction and increase the risk of erosion of the substrate.
3. Inadequate reprocessing
If the washing process after degreasing is not thorough, the residual alkaline degreaser will continue to act on the surface of the alloy, causing discoloration and corrosion.
III. Solutions
1. Selection of suitable degreasing powder
Choose Bigely electrolytic degreasing powder BC-1108, which is specially designed for alloy workpieces, to ensure that its composition is suitable for the material of the workpieces and to avoid corrosion and discoloration.
2. Optimization of process parameters
Reasonable control of current density, temperature and time in the degreasing process to avoid excessive electrochemical reaction.
3. Enhance reprocessing
Immediately after degreasing, thoroughly wash the workpiece with plenty of water to ensure that no residual alkaline substances remain.
4. Regular maintenance and testing
Regularly test the composition and concentration of degreasing powder, timely replace and adjust the formula to ensure the consistency and stability of degreasing effect.
Conclusion
By using Bigely electrolytic degreasing powder and other measures, we can effectively solve the problem of discoloration and corrosion after electrolytic degreasing of alloy workpieces, and improve the quality and reliability of plating process. May these methods provide strong support for your challenges in the plating process, so that your plated products can meet your customers' orders.
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