PCB circuit board corrosion process
PCB board is one of the most common electronic components at present, and almost all electronic products will use PCB board!
PCB circuit board is widely used in electronics, computers, electrical appliances, mechanical equipment and other industries. It is the support body of components and is mainly used to connect components to provide electricity. Among them, the most common and widely used are 4-layer and 6-layer circuit boards. Different levels of PCB board layers can be selected according to industry applications.
Printed circuit board: also known as printed circuit board, printed wiring board, or printed board for short, PCB (printed circuit board or PWB (printed wiring board) in English, with insulating board as base material, cut into a certain size, with at least one conductive pattern attached to it, and holes (such as component holes, fastening holes, metallized holes, etc.) are arranged on it, which is used to replace the chassis of electronic components in the past and realize the interconnection between electronic components. Since this board is made by electronic printing, it is called “printed” circuit board. It is not accurate to call “printed circuit board” “printed circuit” because there is no “printed component” on the printed board but only wiring.
PCB circuit The board is an important electronic component and a support for electronic components. Automatic soldering machines provide technical support for the soldering of PCB circuit boards, which has enabled the development of electronic components to progress. However, the problem of corrosion of PBC circuit boards has always troubled automatic soldering merchants
PCB circuit board corrosion method:
Prepare a corrosion solution, generally multiple circuit boards can be corroded at one time. The corrosion solution is generally made of ferric chloride and water. Ferric chloride is a yellowish solid and is easy to absorb moisture in the air, so it should be sealed and stored.
PCB circuit board corrosion steps:
After the corrosion solution is prepared, start corroding from the edge of the PCB circuit board. When the copper foil not covered with carbon powder is corroded, the circuit board should be removed in time to avoid the useful carbon powder from corroding after it falls off. Circuit.
After taking out the corroded circuit board, you need to rinse it with clean water and use fine sandpaper to polish the carbon powder. Then wipe it dry to reveal the shiny copper foil, and the circuit board is completed.
Finally, in order to better preserve the circuit board, the polished circuit board is usually coated with rosin solution, which can both assist soldering and prevent oxidation.
What is the process of PCB circuit board corrosion:
The corrosive liquid is usually made of ferric chloride and water. Ferric chloride is a yellowish solid and is easy to absorb moisture in the air, so it should be sealed and stored. When preparing ferric chloride solution, 40% ferric chloride and 60% water are generally used. Of course, more ferric chloride, or warm water (not hot water to prevent paint from falling off) can make the reaction faster. Be quick. Note that ferric chloride is corrosive to a certain extent. Try not to touch your skin and clothes. Use a cheap plastic basin as the reaction container, which can hold the circuit board.
Start corroding the PCB circuit board from the edge. When the copper foil without paint is corroded, the circuit board should be removed in time to prevent the useful circuit from being corroded after the paint falls off. At this time, rinse with clean water and scrape off the paint with bamboo strips or other objects (the paint comes out of the liquid at this time and is easier to remove). If it is not easy to scrape, just rinse it with hot water. Then wipe it dry and polish it with sandpaper to reveal the shiny copper foil, and a printed circuit board is ready. In order to preserve the results, the polished PCB circuit board is usually coated with rosin solution, which can both help soldering and prevent oxidation.