Copper bright cleaning agent to use

Copper bright cleaning agent to use

Hydrogen peroxide (30%) 300-400ml / L (by volume)

Environmental protection Wash copper water 50 ml / L (volume)

Water level

Temperature 35-55 ° C (best: 40-45 ° C)

PH 1.00-1.80 (best: 1.10-1.60)

Polishing time of 1-8 minutes (depending on the substrate before cleaning and after cleaning the brightness requirements)

Preparation of environmental protection copper water

Add the required tap water to the cleaning tank, then add the hydrogen peroxide components to stir, then add copper water to stir. Determine the pH of the wash copper water. If the pH is below 1.0, adjust the pH to 1.10-1.20 with 10% aqueous NaOH. If the pH value is high, add the product of the liquid to adjust.

Operation guidance and bath maintenance

(1), pH control

In the process of copper washing, the pH value of the wash copper water will continue to rise, when the pH value is higher than 1.60, with copper water to adjust the pH to 1.10-1.20 range. After cleaning, the surface brightness of copper or copper alloy is not only related to the cleaning time, but also to the pH value of the copper wash solution. When the pH value of the wash water is higher than 1.60, especially higher than 1.80, the brightness of the cleaning is obviously reduced. On the other hand, if the pH of the wash water is too low (<1.0), the surface of the copper and copper alloy is activated during cleaning. In this state, the brightness of the copper and copper alloy is insufficient.

(2), hydrogen peroxide added

In the process of cleaning the concentration of hydrogen peroxide in the continuous reduction of this time during the operation should be intermittent amount of hydrogen peroxide to ensure that the concentration of 30-40% in the range of hydrogen peroxide concentration is too low not only affect the workpiece polishing speed also affects the workpiece The quality of the polishing. When its concentration is lower than the specified concentration often lead to copper and its alloy surface can not form a brown oxide film. In this case, the copper and copper alloy surface after cleaning the brightness is insufficient.

(3), the amount of copper water added

Set the copper and copper alloy workpiece, the average cleaning time of 5 minutes per liter of environmental protection wash copper water solution area of 10-15 square meters.

(4), wash copper water replacement and service life

With the progress of copper washing, the concentration of copper ions in copper water is increasing, and when the concentration is close to or reaches the solubility of copper sulfate, the surface of the workpiece no longer has metallic luster brown oxide film, wash copper water to lose normal polishing effect. But the scavenging effect of the scale still exists, then you can all scrapped and replace the new copper water. Set the average cleaning time of the workpiece for 5 minutes, the washing water life of 1.0-1.5 square meters / liter.