Cleaning and treatment method of copper surface


During the processing and production process, due to th […]

During the processing and production process, due to the characteristics of copper itself, it is very easy to rust and corrode in places with high environmental humidity. If it is used frequently, the problem is less, but if it is left for a long time, it will cause damage to the copper product. The copper materials we use daily are divided into red copper and its alloys (brass, bronze, cupronickel), and their chemical treatments vary greatly. Many people know that copper and its alloys have corrosion resistance, but they know very little about their specific properties. .

In fact, the surface cleaning of copper materials mainly focuses on two issues: 1. Can the oil and wax stains on the copper be cleaned? 2. Will it affect the surface gloss of copper materials? So how to deal with the oil on the surface of copper is the best? The simplest treatment method is, of course, to use a copper cleaning agent. Brass, copper, bronze, etc. can be used. For example, surface oil, fingerprints, and oxide layers can be cleaned with copper cleaning agent first. However, the choice of cleaning agent depends on the material.

Red copper is resistant to general inorganic acids, but not to nitric acid, aqua regia, hydrogen sulfide, etc., but it is not resistant to alkalis, especially ammonia-containing inorganic and organic alkalis. Because copper alloy is doped with various metals, its acid resistance and alkali resistance are greatly reduced. The red copper and its alloy are easily oxidized and changed in the air after cleaning, so passivation treatment must be carried out immediately. While brass bronze has a certain degree of corrosion resistance, but during surface treatment, various oxidation corrosion problems often occur. If the brass surface is only slightly oxidized and discolored, and there is no serious black oxide or patina, just use a professional cleaning agent to soak and remove it.



However, if the brass surface is severely oxidized, there is serious black oxide or patina. In this case, it is difficult to achieve the desired effect with a single cleaning agent, because the corrosion has affected the interior of the brass substrate. After cleaning, there will still be a corrosion mark on the brass surface, resulting in uneven overall effect. At this time, Fullway Technology Co., Ltd. recommends that you can choose polishing treatment, such as mechanical polishing, chemical polishing, mechanical polishing includes vibration grinding, magnetic grinding, grinding and polishing. In addition, if you want to avoid this situation for a long time, you can also choose passivation treatment. No matter how serious the surface of the copper material is, it can be cleaned under normal circumstances, and it can be kept in the air after treatment by ultrasonic and immersion. There is no big problem for a year or more.

Although choosing the right copper cleaning agent and the correct cleaning method are very important, Fullway Technology Co., Ltd. recommends that we still need to check regularly no matter what we do, pay attention to the usual maintenance, in order to prolong the service life of the product and prevent some accidents from happening.