What causes the high alkalinity of the electrophoresis solution?

There's a problem with the anode tube, if you're doing cathodic electrophoresis. It is also possible that alkaline substances have been mixed in.

The product brings the degreaser into the paint tank.

The anode tube is ruptured, (if the anode solution is blackened, it is broken).

Adding a small amount of acetic acid or lactic acid to the secondary tank can keep the pH within plus or minus.

Hello dear, <>

pH value and conductivity are two important process parameters of electrophoretic coating, which have an important impact on the electrophoretic coating of aluminum profiles. In daily production, the electrophoresis tank is mainly maintained with reference to the test results of these two parameters. At present, the white electrophoretic paint used in the aluminum profile industry is mainly acrylic resin, which is insoluble in water in an acidic environment and has a tendency to automatically condense and deposition, so when the pH value is too low, the water solubility, stability and electrodeposition performance of the electrophoresis resin deteriorate, and the electrophoresis liquid becomes turbid, which makes the paint film rough and even electrophoresis cannot be carried out.

When the pH value is too high, the electrolysis reaction of water is intensified, the bubbles increase, and pinholes are easy to occur. In addition, if the pH value is too high, the dissolution of the electrophoretic paint film will be aggravated, and the precipitated paint film will become thinner or even non-adhesive. If the conductivity of the electrophoresis tank solution is too large, the deposition speed of the electrophoretic paint will be too fast, and the swimming penetration will be reduced, which will cause the coating surface to be rough and produce pinholes. In production, as the electrophoresis process progresses, the electrophoresis bath will continuously produce ammonium ions, which will increase the pH value and conductivity of the bath.

In addition, the impurity ions brought from the previous process will also increase the conductivity of the electrophoresis bath fluid, and when the pH value and conductivity increase to the point that they deviate from the process range, we can solve the problem by refining the electrophoresis bath solution. Hope it helps. <>

Kiss. The best way to lower your pH is to change the water or add new water. Generally, the hydrogen ion concentration range for the safe survival of fish is that mol (pH value, the best value is 7 - do not add lime, do not talk nonsense if you don't understand, quicklime is to increase the pH value.

Acids definitely lower the pH. Splashing kilograms of vinegar or 10 milliliters of glacial acetic acid on each square meter of water surface should be able to come down. At the same time, Wang Gai should pay attention to the newly injected water, the pH value should not be too high, and the dredging should be carried out to remove the algae in the water.

The use of 50kg of zeolite powder (200 mesh) per mu of water depth of 1 meter can remove 95% of ammonia nitrogen in the water, purify the water quality, and alleviate the phenomenon of water transfer (Li Songxun, 1993). When the total amount of ammonia nitrogen in the shrimp pond exceeds the allowable content of trapped fiber, it is reached, and the ammonia nitrogen content of the pond water can be reduced to a safe concentration after treatment with zeolite 16mg l. (Sun Guoping (1997), when zeolite is used as a slag improvement agent, the general amount of seawater is 80pmm, and the amount of fresh water is 15pmm.

Hu Wenping, 1998).