Activated acid is a general-purpose activator that replaces the traditional hydrochloric acid and sulfuric acid activation process, and is suitable for the activation of metal surface electroplating pre-treatment and post-treatment. It can activate steel, copper, nickel and other metals, effectively remove the oxide scale on the surface of the product, make the surface uniform and micro-roughened, and improve the adhesion of the coating.
The activated acid is composed of compound acid salts and activation additives, the appearance is white powder, the aqueous solution is acidic, the working temperature: 20 - 40, the pH value of the bath solution: 25 - 3.5. Processing time: 10-90 seconds, configuration ratio: 50 - 100 g l, add water to dissolve
Features and advantages: 1. Environmentally friendly and harmless, it does not contain strong acids (sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid).
2. Activate steel, copper, nickel and other metals to facilitate subsequent electroplating.
3. In the process of operation, no harmful gases are released to improve the working environment.
4. The trough is convenient and simple, used at room temperature, and the energy consumption is low.
5. The working fluid is stable, the operation life is long, and the crystallization is less.
6. Powdery characteristics, convenient for packaging, transportation, storage and storage.
Tank preparation method: add about 80% water, add this product, stir until completely dissolved, fill with water to the required tank volume, and heat to working temperature.
5-10% recommended.
Replenishment and maintenance:
In the process of use, the concentration of the tank liquid will be reduced due to deoxidation and product take-out, and it will be replenished in time according to the concentration analysis results of the solution.
Concentration Analysis Method:
Pipette 1 ml of tank solution into a 250 ml Erlenmeyer flask, add water to 100 ml, add 20 ml of 20% sulfuric acid solution, add 2-3 g of potassium iodide, and leave in a dark place for 15 min with 01mol l sodium thiosulfate standard solution was titrated to light yellow, 3-5 drops of starch indicator were added, and the titration was continued until light yellow without fading as the end point. Content (g l) = 117 c v
c—Concentration of sodium thiosulfate standard solution used (mol l).
v—Volume (ml) of sodium thiosulfate standard solution used