Tinning operation process

Abstract

The invention discloses a tinning operation process. The tinning operation process is characterized by comprising the following steps: 1) ensuring that the water level and temperature of each cylinder are in normal states, wearing working boots and acid-and alkali-resistant gloves or fingerstalls according to production requirements and ensuring that a swing, a circulating pump, a direct current source and a pump are in normal states; 2) scrubbing a tinning bath; 3) injecting industrial pure water accounting for 1 / 4 of a standby bath into the standby bath, slowly adding metered sulfuric acid under stirring, adding metered copper sulphate in virtue of heat released in dissolving of sulfur acid in water and carrying out stirring until complete dissolving is realized, wherein temperature should not exceed 60 DEG C; 4) adding 1 to 2 ml of hydrogen peroxide into each L of a solution obtained in the previous step and carrying out violent air pumping and stirring for one to two hours; 5) phosphor copper treatment of a positive electrode; 6) taking out a soaked positive electrode bag, draining the positive electrode bag through dripping and sleeving the bag with titanium blue; and 7) carrying out sample and analysis, adjusting the components of a reagent solution to a controlled range, carrying out electrolytic treatment with an electrolysis plank at a rate of 2.0 A / dm<2> for 2 h, then carrying out electrolysis at a rate of 0.5 A / dm<2> for 3 to 4 h and adjusting the content of a luminescence agent to a normal range by using a Hull cell before trial plating. The tinning operation process is simple and clear and can improve operation speed and electroplating effect.

Description

Technical field [0001] The invention relates to a tin plating operation process. Background technique [0002] Alloy is a coating with good solderability and certain corrosion resistance, which is widely used in electronic components and printed circuit boards. In addition to the physical methods such as hot dipping and spraying, the methods of electroplating, immersion plating and electroless plating have been widely used in industry because of their simplicity and ease. [0003] At present, the tin plating operation process is relatively complicated, and there is no uniform specification or standard. Many repeated procedures also make the production efficiency lower, increase the labor burden of the workers, and make the product less competitive in the market. For some operators who are just entering the industry, there is no clear method and technology, which often causes errors and omissions during operation, and may even cause serious consequences. Summary of the invention ...

AI Technical Summary

Problems solved by technology

[0003] At present, the tinning operation process is relatively complicated, and there is no uniform specification and standard. Many repeated processes also make the production efficiency low, increase the labor burden of workers, and make the market competitiveness of the products low.

For some operators who have just entered the industry, there is no clear method and process, resulting in frequent mistakes and omissions during operation, and may even cause serious consequences