Copper pipe welding process and how to make copper bar shine

I. Welding sequence of red copper pipe

(1) Before heating, apply flux to the part to be welded.

(2) The heating is inserted into the copper tube and sleeve, and the flame nozzle is continuously moved back and forth between two points. Do not touch the flux directly with the flame. The temperature is slightly higher when you heat a steel tube than when you heat a copper tube.

(3) when the copper tube is heated and the flux melts into a liquid, immediately put the preheated electrode on the solder joint. As soon as the electrode begins to melt, the flame nozzle moves back and forth between until the solder flows into the gap between the two tubes.

(4) Remove the flame, so that the solder contact with the welding point, maintain a few seconds before removing. If a gap between the tubes is suspected or detected. It can be reheated so that the flame nozzle moves continuously at two points. A small amount of solder can be added.

Two, how to make copper pipe light

Copper in the dry air is very stable, but the surface of the radiator copper tube in the humid air is easy to be corroded, generating a layer of green material, commonly known as "copper green", its main component is "basic copper carbonate". So, how to remove verdigris? We can remove the patina by mechanical friction, but this is not only troublesome, but will damage the surface of the bronze. Here's a good way to get rid of the patina. Measure 20 ml of concentrated ammonia water into a beaker with a measuring cylinder, then inject 40 ml of distilled water, stir it with a glass bar, and make ammonia solution, namely copper rubbing water. Coppery water can react with patina to form a soluble blue copper ammonia complex, thereby removing patina. In order to improve the effect of copper cleaning water in addition to patina, copper cleaning water can also be mixed with chalk or talcum powder, which can increase mechanical friction, make the deep copper rust fully exposed, ensure the complete reaction of patina and ammonia, so that the surface of the copper is smooth and bright. Dip in with cotton take brush copper water, scrub repeatedly on the copper products that have copper rust. Soon, the rust disappeared from the surface of the copper, and the copper returned to its bright metallic luster, while the cotton was dyed blue. When the verdigris on some copper products is not easy to remove, can soak in rubbing copper water for a while, reoccupy dips in the cotton that has rubbing copper water to scrub.

Copper corrosion in the humid air is a kind of chemical reaction, corrosion appears copper becomes not good-looking, through the above operation will make the copper tube beautiful, bright.