The modern chemical industry produces a multitude of spillable kinds of useful cleaners and protectors of electrical contacts from corrosion and oxidation. But do not discount the recipes of such cleaners, because they too can be useful when working with certain devices. This article describes several chemical formulations available for cleaning and protecting your contacts.
Recommendations for the use of contact cleaners:
Contact cleaners are relatively easy to make at home, and you don’t need any exclusive materials.
You can apply the recommended cleaners to contaminated areas with anything, depending on the type of contacts and the freedom of access to them.
After any of these cleaners, you need to move the contacts to get the compound into all the metas of the surface to be cleaned. You also need to wait about 15 minutes for the solvent to evaporate, then wipe the contacts with a rag to remove dissolved dirt and excess solvent.
How to make a liquid for cleaning electrical contacts recipe one:
You need to mix in a glass jar the substances in proportions:
250 ml of concentrated aqueous ammonia,
750 ml of methanol (this substance is poisonous) or ethyl alcohol denatured with gasoline.
Store the mixture in a well-closed glass container.
How to make a liquid for cleaning electrical contacts recipe two:
It is necessary to dissolve 20 – 50 ml of Vaseline (medical) oil in 950 ml of extraction gasoline. After that you need to mix it thoroughly and pour it into a bottle.
Compound for cleaning silver contacts:
If you can take the pins out and put them in the solution, this is what you can use:
The contacts are first degreased by washing them in trichloroethylene, ether or tetrachloromethane. Degreased contacts are immersed in a bath with 5% solution of potassium cyanide (BEWARE VERY WARNING: it’s poison!!!). When the contacts are immersed in the solution (not more than 1 minute), it is recommended to move the parts. If during this time the dark layer on the silver contacts will not dissolve, you need to immerse the parts in a new solution (the old one is already saturated).
When the contamination is gone, the silver contact should be rinsed well under running water.
Keep in mind that after this removal the silver is very prone to new oxidation! Therefore, your contacts should be placed in a concentrated (25%) pure ammonia solution for no more than 3 minutes (stir the mixture continuously). Then you should rinse well with running water, or in ethyl alcohol, denatured gasoline or ether and dry well.
After such an operation, the silver contacts will no longer oxidize under the influence of the external environment.
A prescription for contact protectants:
If you need to “preserve” electrical contacts for a long time, do the following: In a porcelain cup dissolve at low heat 10 – 30 g of stearic acid and 980 ml of trichloroethylene (tetrachloromethane or tetrachloroethylene can also be used instead of trichloroethylene).
The solution must be allowed to stand and poured into a bottle with a good stopper. This solution has a protective “preservative” effect. Such a solution should be applied to thoroughly cleaned, degreased and dry contacts in a uniform layer.
P.S.: I have tried to show and describe the tips clearly. I hope that at least something will be useful to you. But it is not all that is possible to make up, so go ahead and read the site https://bip-mip.com/
