After using the three proof paint, we may encounter some problems with how to remove it. Next, let's explore this removal method.

There are many methods to remove the three proof paint, such as using methanol and alkaline activator solution or ethylene glycol ether and alkaline activator solution, or toluene xylene; But the most effective way is to use specialized solvents to remove different three proof paints.

Three proof paint can be divided into six categories based on chemical composition: acrylic ester, silicone, polyurethane, epoxy resin, nano, and water-based. If methanol and alkaline activator solution or ethylene glycol ether and alkaline activator solution are used for cleaning, the effect is not ideal.

Correct eradication method:

Cleaning solvents (specialized solvents for different types of three proof paints), mechanical wiping, and high-temperature dissolution of coatings: If repairing coated components, simply touch the coating directly with a soldering iron to remove the component. Then install new components and clean the area with a brush or solvent; It can also be cleaned with solvents; After drying, re coat with paint.

There are specialized stripping agents for removing polyurethane three proof paint, which should be available in places where three proof paint is sold. Alternatively, methanol and alkaline activator solution or ethylene glycol ether and alkaline activator solution can be used, and toluene xylene can also be used. The most commonly used method is to dissolve and solidify the three proof paint film with a specific chemical solvent, as it is simple, easy to implement, and does not pose any harm to the product.

How can the three proof paint for repairing circuit boards be removed to facilitate repairs

Coating circuit boards with three proof paint is generally the final process in PCB assembly. However, during final inspection, electronic components may have defects, and in this case, the three proof paint coating is required to be repairable.

Coating circuit boards with three proof paint can provide various protections for electronic components used in harsh environments, including moisture, mold, dust, insulation, maximum reduction of dendrite growth, and stress relief. Three proof paint circuit boards make electronic components more durable, improve the reliability of electronic devices, and reduce warranty costs.

When the circuit board needs to be repaired, valuable components on the circuit board can be removed separately and the remaining parts can be discarded. But a more common method is to remove all or part of the protective film on the circuit board and replace the damaged components one by one. When removing the protective film of the three proof paint circuit board, it is necessary to ensure that it will not harm the substrate under the components, other electronic components, and structures adjacent to the repair direction. The removal methods of protective film mainly include: using chemical solvents, micro grinding, mechanical methods, and removing welding through the protective film.

Article sourced from Jiangmen single and double-sided circuit boardhttp://www.yonghongpcb.com