Electroplating process, the workpiece surface cleanliness requirements are higher, and ultrasonic cleaning technology is to achieve this ideal technology. Using ultrasonic cleaning technology, you can replace the solvent cleaning oil; can replace the electrolytic degreasing; can replace the strong acid etching to remove carbon steel and low alloy steel surface rust and scale.
On the surface of several common workpiece electroplating conditions, with ultrasonic cleaning process Profile:
1. Polishing surface polishing paste cleaning: In general, the polishing paste is often paraffin blend, paraffin molecular weight, high melting point, is solid at room temperature, is more difficult to clean the material, the traditional approach is to use organic solvent cleaning or high temperature Alkaline boiling wash has many disadvantages. The use of ultrasonic cleaning can use water-based cleaning agent, the temperature conditions, the workpiece surface thoroughly clean within a few minutes, the common process is: ① soak → ② ultrasonic cleaning → ③ water (water purification) rinse.
2. Surface of the oil and a small amount of rust cold-rolled steel: cold-rolled steel surface generally have oil, dirt or a small amount of rust, to clean it easier, but after the general method of cleaning, the workpiece surface remains a very thin layer of floating ash, Affect the quality of follow-up processing, and sometimes have to use strong acid soak to remove this layer of floating ash. The use of ultrasonic cleaning and adding the appropriate cleaning fluid can be easily and quickly achieve the workpiece surface thoroughly clean and make the workpiece surface with high activity, and sometimes can even be removed before plating acid leaching activation process.
3. Surface oxide and yellow rust of the workpiece: the traditional approach is to use hydrochloric acid or sulfuric acid soak cleaning. Such as the use of ultrasonic integrated processing technology, you can quickly and within a few minutes at the same time remove the surface of the oil, rust, and avoid the strong acid cleaning accompanied by the issue of hydrogen embrittlement.
After plating on the coating for a variety of treatments to enhance the coating of various properties, such as corrosion resistance, anti-discoloration, solderability and so on.
Dehydration treatment: add dehydration agent in water, such as bright nickel after treatment.
Passivation: to improve the corrosion resistance of the coating, such as galvanized.
Anti-discoloration treatment: anti-discoloration agent added to the water, such as silver, tin, plated imitation gold and so on.
Improve solderability treatment: such as tin so the quality of the post-treatment process directly affects the coating of these functions is good or bad.