What Is The Process Of Corrosion On The PCB Circuit Board?

The PCB circuit board is widely used in electronics, computer, electrical appliances, machinery and equipment industries, it is the support body components, mainly used to provide electrical connection components, one of the most common and widely used 4 layer and 6 layer circuit board, according to industry application can choose PCB layers in different degrees.


PCB insulation board as base material, cut to size, which is at least a conductive pattern, and cloth with holes (such as element holes, fastening holes, holes, etc.) to replace the previous device of electronic components of the chassis, and realize mutual connection between electronic components. Because this kind of board is made by electronic printing, it is called printed circuit board. The term "printed circuit board" is known as "printed circuit", because there is no printed component on the printed circuit board and only wiring.


PCB circuit board is an important electronic component, and is the support of electronic components. The automatic soldering machine provides technical support for the soldering of PCB circuit boards, and makes the development of electronic components progress. However, PBC circuit board corrosion problem has been plagued by automatic soldering businesses, Luen Hing Wah electronic through years of accumulated experience, research solutions PCB circuit board corrosion problems.


The corrosion solution is usually made of ferric chloride and water. The ferric chloride is a solid yellow soil, and it is also easy to absorb moisture in the air. Therefore, it should be sealed and preserved. The allocation of ferric chloride solution is generally 40% ferric chloride and 60% water, of course, with warm water or more ferric chloride, the reaction faster that ferric chloride has a certain resistance, try not to touch the skin and clothing, cheap plastic pots used in the reaction vessel, and put it under the board.


Corrosion of the PCB circuit board starts from the edge. When the painted copper foil has been corroded, the circuit board shall be removed in time to prevent corrosion of the useful lines after the paint has fallen off. Wash it with clean water, and use the bamboo pieces to remove the paint. If it doesn't scratch, just flush it with hot water. Then dry it and rub it with sandpaper to reveal the shiny copper foil, and a printed circuit board is ready. In order to save the results, usually polished PCB board with good solution of rosin coated again, can help, and can prevent the oxidation of.


 

(Source: internal information)

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