1. Identification of scrap copper, scrap copper color discrimination: Purple Zatong general color purple, but also some purple-brown. Brass is usually yellow or orange, white brass-rubbing metallic luster, old brass, some with dark brown and dark green. Health brass generally sallow. Nickel alloy surface is mainly silver. Purple fire copper surface is red and yellow. 2, scrap copper corrosion identification: Copper rusty dark green or dark gray. Because no other metal raw green rust, so one of the main sign recognition patina copper. But laboratory carefully identified, attention may be covered partially corroded oil. 3. Identification of scrap copper off the ground: Some products do not entirely copper, but pack a layer of copper or copper plated with a layer from the surface is difficult to identify, can be a hard thing rubbing the skin or cut off from its stubble of identification. 4. Identification of scrap copper Sound: This method applies only to identify the copper, copper, brass and copper items like ring. When the beating with a wooden stick, if it is iron and steel products, issued by the shrill sound faster end. If copper, issued a hum Weng sound, sound ends slower. However, this method for grade bronze castings and other large NA. Stainless steel and nickel alloy (or nickel-plated bronze) differences are: stainless steel onto the floor will be issued relatively loud sound, and texture is hard, reflective, white copper onto the floor have called dull sound, and soft texture, no reflection color dim. Dongguan Hengli scrap recycling companies Dongguan Dongcheng Yuan Feng renewable resource recycling company Contact: Mr. Liu Mobile: 13580923273 Fax: 0769-27281633 QQ: 3134486974 Website: http: //www.yfzy88.com/ Address: Dongguan Dongcheng District Huang Kung-pit with sand Dongguan Dongcheng Yuan Feng renewable resource recycling shop has been in existence for many years, is a large scrap metal recycling companies in Dongguan. Specializing in scrap copper scrap and other non-ferrous metal recovery and recycling of used molds and chrome steel business. The company expand into Shenzhen, Huizhou, Guangzhou, Zhongshan and other cities, while my company adhere to the "Economic development, to protect the environment," and adhere to the "credibility first, service first" principle in order to save energy and resources in order to all enterprises and institutions to reduce production costs, to provide our clients with excellent service funding. China is committed to building the province's largest, most professional waste recycling industry. Dongguan Dongcheng Yuan Feng renewable resources, recycling is a full license, with the recovery of qualification units. Units to environmental protection, science and technology, standardized as the center for the environmental protection industry activities. The above information is the industry news and information, and has nothing to promote information