How do you clean up triple-proof paint?

In everyday life, the use of electronic devices is becoming more and more widespread. In order to ensure product quality and reliability, the application of conformal coatings is becoming more and more common. After using conformal coating, we often need to clean some or all of the conformal coating. Once we adopt the wrong method to clean the conformal coating on the item or product, it will more or less cause damage to the item or product, so how to clean it up? How do I clean up without damaging my belongings? This is especially important at this time. Conformal coatings are widely used in modern industrial production and electronic equipment manufacturing to protect electronic components from moisture, dust, and chemicals. However, over time or certain situations arise, conformal coating may need to be cleaned. So, how to clean up the conformal coating?

First of all, before cleaning, we need to understand the characteristics of conformal coating. In general, conformal coatings have strong adhesion and durability, but they are not impossible to remove. Common types of conformal coatings are acrylic, silicone and polyurethane, and there may be differences in cleaning methods for different types of conformal coatings.

In the case of acrylic conformal coatings, organic solvents can usually be used to clean them. For example, alcohol, acetone or banana water can effectively dissolve and remove acrylic conformal coatings. When using organic solvents, care should be taken to avoid skin and eye contact, and to operate in a well-ventilated environment to prevent harmful gases from volatilization of organic solvents from causing harm to the human body.

Silicone-based conformal coatings are relatively difficult to clean because of their high chemical stability. It can usually be cleaned with special silicone cleaners or abrasives. These cleaners or abrasives are effective in removing conformal silicone coatings, but they need to be used with a controlled force and time to avoid damage to the electronic components.

The cleaning method of polyurethane conformal coating is similar to that of acrylic and can be dissolved and removed using organic solvents. However, it is important to note that the resistance of different brands and models of polyurethane conformal coatings to organic solvents may vary, so sufficient trials and tests should be carried out when choosing a cleaning agent.

In addition to the use of organic solvents, conformal coatings can also be removed by mechanical cleaning. For example, a tool such as sandpaper, a grinding wheel or a grinder can be used to sand the surface of the conformal coating before cleaning it with a cleaning agent. This method is suitable for situations where conformal coating removal is required or organic solvents cannot be used, but care should be taken to control the grinding force and time to avoid damage to electronic components.

Electronic components should be protected from damage caused by cleaning agents or tools before cleaning.

When cleaning conformal coating, you also need to pay attention to the following points:

Choose the right cleaning tool and cleaning agent, depending on the type and characteristics of the conformal coating.

(1) Use solvent cleaning: Use appropriate chemical solvents (such as alcohol, acetone, banana water, special detergents, etc.) to dissolve the conformal coating. Pour the solvent onto a clean cloth or cotton swab and gently wipe the area of the board that needs to be cleaned. This method is suitable for small area cleanup. When using, we should pay attention to ensure that the solvent is effective against the conformal coating, and pay attention to the safety of operation, avoid skin and eye contact, and ensure good ventilation at the same time.

(2) Heating and purging: Use a heat gun or hair dryer to heat the conformal coating coating to soften the coating. After the coating has softened, the conformal coating is removed using a brush or compressed air blowing. This method is suitable for large-area cleanup. When heating, it is necessary to control the temperature well to avoid overheating and causing damage to the circuit board or components.

(3) Mechanical grinding: For thicker conformal coatings, you can use fine sandpaper or polishing cloth to gently polish until the conformal coating is removed. When grinding, it is necessary to avoid damage to the circuit board or components.

(4) Chemical peeling: Use a special chemical peeling agent, apply it to the surface of the conformal coating, let the peeling agent act for a certain period of time according to the instructions of Schnex conformal coating, and then use a scraper or brush to remove the coating. During the stripping process, we follow safe operating procedures to avoid contact with unprotected electronic components.

Regardless of the method we use, we should wear appropriate protective gear such as gloves, goggles, and overalls during the cleanup process for our own safety. When handling chemical solvents, also ensure that the working environment is well ventilated. At the same time, when cleaning conformal coatings or other conformal coatings, it is also necessary to pay attention to protecting the components on the circuit board from damage.

Pay attention to safety during the cleaning process, avoid skin and eye contact, and maintain good ventilation.

After cleaning, the electronic components should be thoroughly cleaned and dried to remove residual cleaning agents and moisture.

In short, the cleaning of conformal coating needs to choose the appropriate cleaning method and tools according to its type and characteristics, and pay attention to safety and protection of electronic components. Before proceeding with the cleanup, it is best to conduct trials and tests to ensure the effectiveness of the cleanup and the safety of the electronic components.