How to identify red copper, brass and black copper?

Samples of brass and red copper separately, add hydrochloric acid, brass will bubble, red copper will hardly bubble. And black copper is famous for its deep color, which can be separated from the first two by color alone.

Red copper is pure copper, also known as red copper, which has good electrical and thermal conductivity, excellent plasticity, easy hot pressing and cold pressure processing, and is widely used in the manufacture of wires, cables, brushes, electric spark special electroetching copper and other products that require good conductivity.

Brass is an alloy made up of copper and zinc. Brass, which is made up of copper and zinc, is called ordinary brass. Brass is often used in the manufacture of valves, water pipes, connecting pipes and radiators for internal and external units of air conditioners.

Black copper (black copper) red copper. Song Chen Shidao "He Xie Gong Dingguan Secret Pavilion Wen and Deadwood": "The decayed old Mo makes the year, and the stone heart is black and copper."

Traditional handicrafts unique to Yunnan Province. Legend has it that more than 100 years ago, there was a copper-making craftsman in Shiping, when smelting copper, he accidentally dropped a gold ring in the crucible, and the gold was dissolved in copper and cast into a vessel. Occasionally, he stroked it with his hand, and it became famous for gradually becoming jet black.

Cupronickel, brass, red copper (also known as "copper"), bronze (blue-gray or grayish-yellow) are distinguished by color. Among them, brass and brass are easy to distinguish; Red copper is pure copper (impurities<1) and bronze (other alloy compositions are about 5), which is slightly difficult to distinguish. When it is not oxidized, the color of red copper is brighter than that of bronze, and the bronze is slightly cyan or yellow. When oxidized, the red copper turns black, while the bronze takes the color of turquoise (the harmful oxidation of water) or chocolate.

1. Brass. It is an alloy composed of copper and zinc, brass has strong wear resistance, brass is often used in the manufacture of valves, water pipes, air conditioning internal and external unit connecting pipes and radiators. 2. Copper is a copper element.

Copper is used in the production of motor short-circuit rings and electromagnetic heating inductors. 3. Red copper.

That is, pure copper, which is an elemental copper substance. Red copper is electrically conductive.

and thermal conductivity, good plasticity, easy hot pressing and cold pressure processing, used in the manufacture of wires, cables, brushes, electric sparks, etc. <

1. Brass is an alloy composed of copper and zinc, brass has strong wear resistance, and brass is often used in the manufacture of valves, water pipes, connecting pipes and radiators of internal and external units of air conditioners.

2. Copper, also known as red copper, is a copper element. Copper is used in the production of motor short-circuit rings and electromagnetic heating inductors.

3. Red copper is pure copper, which is an elemental copper substance. Red copper has electrical and thermal conductivity, good plasticity, easy hot and cold pressure processing, and is used to manufacture wires, cables, brushes, electric sparks, etc.

Brass identification: 1. Put brass into a container containing dilute hydrochloric acid (or dilute sulfuric acid), and the bubbles on the surface are brass.

2. Put brass into a container filled with ferrous sulfate solution, and after a period of time, the color of the reagent will change, which is brass.

3. Add silver nitrate solution to turn silvery-white into brass.

4. Burn it with fire, and the brass and brass will become red.

Speaking of copper, a metal chemical element, friends should be very familiar with it, and most people have also seen copper, the most common is the copper wire in the wire. Copper is the earliest metal used by humans, dating back to prehistoric times. However, copper is only the name of this metal chemical element, and there are many types of it.

Such as red copper, bronze, brass, white copper, etc. Now let's focus on copper and brass. Although both copper and brass belong to the copper category, there is a difference between the two, and this article will focus on the difference between copper and brass.

Difference Between Red Copper and Brass

Red copper is pure copper, also known as red copper. The color of pure copper is orange or rose red, but it will oxidize to purple when exposed to air, so it is called copper.

Copper is not necessarily pure copper, and sometimes a small amount of deoxidizing elements or other elements are added to improve the material and performance, so it is also classified as a copper alloy. According to the composition, China's copper processing materials can be divided into: ordinary copper (T1, T2, T3, T4), oxygen-free copper (TU1, TU2 and high-purity, vacuum oxygen-free copper), deoxidized copper (TUP, TUMN), and special copper (arsenic copper, tellurium copper, silver copper) with a small amount of alloying elements.

The electrical and thermal conductivity of red copper is second only to silver, and it is widely used in the manufacture of conductive and thermally conductive equipment. Copper has good corrosion resistance in the atmosphere, seawater and some non-oxidizing acids (hydrochloric acid, dilute sulfuric acid), alkali, salt solution and a variety of organic acids (acetic acid, citric acid), and is used in the chemical industry. In addition, copper has good weldability and can be processed into various semi-finished products and finished products by cold and thermoplastic processing.

In the 70s of the 20th century, the production of copper exceeded the total production of other types of copper alloys.

Brass is a copper-based alloy with zinc as the main alloying element, so named because it is often yellow. Brass has beautiful color, good process and mechanical properties, high electrical and thermal conductivity, corrosion resistance in the atmosphere, fresh water and seawater, easy cutting and polishing, good weldability and cheap. It is often used in the production of conductive and thermally conductive elements, corrosion-resistant structural parts, elastic elements, daily hardware and decorative materials, etc., with a wide range of uses.

Generally speaking, the cutting performance of brass is better than that of red copper (red copper is easy to stick to knives); In terms of non-cutting machining, red copper has less deformation resistance and is easier to form.

What is the density of red copper? m3, melting point of 1083 degrees, non-magnetic, good electrical and thermal conductivity, corrosion resistance, toughness.

The density of brass is mostly lined with mechanical bearings, and it is wear-resistant.

Brass is a Cu-Zn alloy with about 80% copper. The hardness is greater than that of copper, but the electrical and thermal conductivity is poor.

The above is a detailed introduction to the difference between copper and brass, I believe that after you have seen it, you will have a more comprehensive understanding of copper and brass, and it is easy to distinguish between these two types of copper. In fact, whether it is red copper or brass, or other coppers, they all have their own advantages and disadvantages, and they are used in a wide range of industries, which have played a great role in the development of society.

<>First of all, the two are different in color. Brass is pale golden yellow and shiny. Red copper is rose-red and shiny.

Brass castings are commonly used to make valves and pipe fittings. Red copper, also known as pure copper, is also known as red copper, with a melting point of 1083 degrees and is not magnetic.

<> can be distinguished from the appearance of wide composition, strength and density, melting point, hardness. 1. Appearance: brass:

Pale golden yellow, shiny, red copper: rose-red, shiny. 2. Ingredients:

Brass: The copper content is about 60%, the zinc content is about 40%, and some grades contain about 1% lead, which is impurity. Copper:

The copper content reaches. 3. Strength: brass has higher strength, and red copper has lower strength.

4. Density: The density of brass is, and brass is mostly used for mechanical bearing lining, because it is wear-resistant, and it is also commonly used to make valves and pipe fittings. Red copper, also known as red copper, has a melting point of 1083 degrees and is non-magnetic.

5, Brass has a harder hardness than red copper 6, and red copper has a higher melting point than brass.