Encountered brass plate blackening solution

In our daily life, often see copper items such as fifty copper coins and so on, after using for a long time, often encounter rusty black, green phenomenon. So why the brass plate black, how to deal with the black brass plate to restore it, the following Buck Copper industry will take you to understand the reasons for the black brass plate and the solution.

A, brass plate black reasons

1, oxygen in the air and brass plate chemical reaction, will lead to black brass plate, if you want to prevent the oxidation of the way is to isolate the air, the use of chemical principle.

2, brass plate black because the surface generated a kind of rust, this rust is actually a kind of protection rust, relatively hard, generally in this case, it is recommended not to use physical methods, otherwise even if cleaned out, the product will be destroyed

Two, brass plate black solution

1, transparent grease in the brass surface coating or paint can, this will make it generated on the surface of a layer of black surface film, at present, the black processing technique because of its high efficiency and oxide film layer has good corrosion resistance, the brass for oxidation, can use sand grinding light, also can be in a reducing atmosphere such as H2 and CO in a certain temperature under its reduction can also, Or treated with water-soluble biodegradable cleaning agents and chromium-free cyanide-free oxidants.

2, for the protection of brass plate surface rust, should pay attention to care, otherwise it will only promote its corrosion, get the opposite effect. It is very normal to have verdigris over time. For copper rust can be used to eat vinegar, sulfuric acid and other strong acid immersion, immersion should be turned over at any time, observe, not overdo it, and then use water or cleaning agent, soft brush clean dry, cleaning is to wash the residual cleaning agent, blow-dry is beneficial to brass plate better anti-discoloration effect.

In order to avoid the brass plate blackened and the use effect is not greatly discounted, you need to pay attention to some maintenance and maintenance methods at ordinary times, we Buck Copper production of brass plate specifications and models are complete, quality assurance, service assurance, welcome inquiries.