Metal surface phosphating common faults and solutions
2023-09-01 03:09:36
Metal surface phosphating common faults and solutions
Common faults: phosphating film formation rate is slow, but prolonged phosphating time can still form a uniform and complete film
The main reasons are: 1. The surface adjustment ability is not strong 2 , the accelerator concentration is not enough 3 , the acid ratio is low 4 , and the phosphating temperature is low.
Solution: 1. Improve the adjustment or change of the tank 2 , add the accelerator 3 , add the alkali 4 , increase the temperature.
Common faults: evenly yellowed surface of the workpiece, but evenly loose phosphating film
The main reasons are: 1. Low total acidity, low acid ratio 2 , low accelerator concentration 3 , low phosphating temperature and short time.
Solution: 1. Add phosphating solution and alkali 2 , supplement accelerator 3 , increase temperature 4 , extend time
Common faults: the surface of the workpiece is covered with a layer of crystal
The main reasons are: 1 , the free acidity is too low 2 , the temperature is too high
Solution: 1. Add some phosphoric acid 2 to lower the temperature.
Common faults: phosphating film local block-like ash, uneven phosphating film at the ash, sometimes colored film
The main causes are: 1. The workpiece has formed secondary yellow-green rust 2 before entering the phosphating tank , the surface adjustment ability is poor 3 , and the impurities in the phosphating solution are many.
Solution: 1 ã€Accelerate process turnover or implement water film protection 2 , improve surface adjustment 3 , replace bath
Common faults: too much bath sediment
The main causes are: 1. The concentration of the accelerator is too high 2 , the free acidity is too high 3 , the phosphating time of the workpiece is too long 4 , and the neutralization excessively forms a crystalline precipitate.
Solution: 1 , let it naturally reduce 2 , add alkali 3 , shorten the time 4 , add phosphoric acid
Common faults: the phosphating film evenly appears color film or evenly hangs white
The main reasons are: 1. The content of the accelerator is too high. 2 , the surface tone is lost or the surface is over-washed. 3 , the phosphating solution is too much, aging.
Solution: 1 , let the accelerator naturally reduce 2 , strengthen the table 3 , change the slot
The above or other circumstances
After the implementation of the above methods, still can not be resolved
Purchasing speed links, requires medicine suppliers in the first time to the scene analysis, guidance, resolve
[This article is edited and edited by Xianghe Phosphate Division. If you need to reprint, please indicate the source in the form of a link, thank you!
Article label: Phosphating solution phosphating film  Phosphating treatment http:// 】
KRTP Cloud Control System Extension
Cloud Control System,Outdoor Light Project,Light Cloud Control System,Cloud Control System Extension
Sichuan Kangruntengpu Photoelectric Technology Co., Ltd. , https://www.krtoplighting.com