Daily identification: This black -hearted merchants to deceive consumers, plating copper colors through crafts, or other processes to make cheap iron as so -called pure copper. In fact, it is very simple. We can use its density, magnetic field and other identification. The proportion of iron and copper is closer, but copper will not be attracted by magnets. Many people who acquire waste products use dedicated strong magnetic (abbreviation of powerful magnets) to determine whether it is pure copper. of course, we can also test whether the items we buy are real pure copper from the horn at home or other items containing magnets. The greater the suction power, the more the iron content is. Ittaisu raw materials that can be attracted by magnets are more expensive, and they will not join metal such as nickel and cobalt. Note: This method can only be determined that it must not be attracted by the magnet. , but what is not attracted to the magnet is not necessarily pure copper, or it may be alloys added to other raw materials. For example, most of our daily life uses copper and zinc alloys, that is, "brass" It pure copper colors are purple -red from the inside out, so they are called copper. For some wires, the color can be viewed on the appearance of the utensils. Generally, it is scraped off the outer layer, or the observation section is also the possibility of purple -red pure copper. Pucting information: Thenic copper is the name of the highest copper content, because the color purple red is also called copper, the main ingredient is copper and silver, the content is 99.5 ~ 99.95%; the main impurities elements: phosphorus, 铋 铋 铋, Platform, arsenic, iron, nickel, lead, tin, sulfur, zinc, oxygen, etc.; Used to make conductive equipment, advanced copper alloy, copper -based alloy.
This Chinese name pure copper
The most copper content of the interpretation is also called the main component of copper plus silver n Chinese copper processing materials can be divided into: ordinary copper (T1, T2, T3), anaerobic copper (oxygen copper, silver oxygen copper, cymbal oxygen copper, and diffuse oxygen copper), phosphorus dehydration copper, adding added Special copper (arsenic, copper, copper, silver, copper, and copper copper) with a small amount of alloy elements. Copper's conductivity and thermal conductivity are second only to silver, and are widely used to make conductive and heat -conducting equipment. Copper has good corrosion resistance in the atmospheric, seawater and certain non -oxidized acids (hydrochloric acid, dilute sulfuric acid), alkali, salt solution and various organic acids (acetic acid, citric acid) for chemical industry. In addition, the copper has good welding properties, which can be made into various semi -finished products and finished products through cold and thermoplastic processing. In the 1970s, the output of copper than other types of copper alloy was exceeded.
The theoretical value of pure copper resistance rate If various materials are made of 1 meter and 1 square millimeter of cross -sectional area, they measure their resistance at 20 ° C (called this kind of this type (called this kind of this kind of kind The resistance of the material) is compared, then the silver resistivity is the smallest, followed by the order of copper, aluminum, tungsten, iron, manganese copper, nickel chromium alloy, and the resistivity increases in order.
The resistivity of the aluminum wire is more than 1.5 times that of copper guide wires, and its resistivity p = 0.0294Ωmm2/m, copper resistivity p = 0.01851 ω · mm2/m, resistance resistance There will be some differences with temperature changes.
The method of distinguishing pure copper is to check hardness, look at the stubble, bending, and throwing method. 1, check hardness The higher the color, the softer the quality, the more white and the surface. Take a copper bracelet of about 60 grams as an example. If you open it with your hand, there is no elasticity, and its color is about 95%; if it is a bit elastic, the color is about 80%-90%; %the following. 2, look at the stubble port This cutting or folding to see the color of the stubble mouth. If the jewelry is soft, the stubble mouth is thick and soft, with a slight redness, the color is about 95%; if the hands are bent hard, the stubble mouth is white and gray, or slightly reddish, the color is about 90%; Larger, the stubble mouth is light red, yellow and white, or gray, with a color of about 80%; if the bend is hard, the stubble mouth is red, yellow, yellow, etc., and the color is about 70%; Or yellow in the yellow, the color is 60%. 3, bending method M pinch with your fingers, soft and flexible in color, easy to bend and not easy to break; Finger folded; the copper of the copper is bent or knocked with a hammer a few times, and the fake will not be able to withstand the bend, which is easy to break. 4, throwing method has high -colored copper jewelry, which is not high on the table, there is a sound of "click"; Very high, the sound of the sound is relatively crisp. This Jewelry Jewelery has many attractive pure copper jewelry, including ring, bracelet, necklace, watch, arm belt, and almost as long as you can think of pure copper ornaments. It often has important aesthetic value to obtain health benefits from wearing. The best techniques of copper jewelry include trying different technologies and considering its completion. Unbuttoned copper, over time, the surface will become colorful. Two copper blocks and lines may be used to create interesting earrings, necklaces, bracelets and rings. rn扩展资料rn纯铜顾名思义就是含铜量最高的铜，因为颜色紫红又称紫铜，主成分为铜加银，含量为99.5～99.95%；主要杂质元素：磷、铋、 Platform, arsenic, iron, nickel, lead, tin, sulfur, zinc, oxygen, etc.; Used to make conductive equipment, advanced copper alloy, copper -based alloy. Baidu Encyclopedia-Pure Copper
Pay content for time limit to check for freenAnswer 1. Putting the brass into a container with dilute hydrochloric acid (or dilute sulfuric acid). The bubbles appear on the surface are brass. 2. Pack into a container with sulfate solution in the sulfate. After a period of time, the color that changes the reagent color is brass. 3. Add silver solution to silver -white is brass. 4. Burning with fire, burning brass will become red.nAsk questions without the above conditions to verify? Anything else?nAnswer a momentnReply to you right awayn1 Look at color: Identifying copper can look at color. Pure copper is purple -red, brass is pale yellow, and bronze is close to white. Fake copper is generally packed by dyeing, and the original color will be exposed after losing the surface with a knife. 2 Listen to the sound: Identify the sound of copper, and gently knock on the surface of the copper. The real copper sound is low, and the sound of "buzz" will make the sound disappear slowly. The sound of fake copper knocking is sharp and disappeared faster. 3 Use magnets: Identifying copper can be used with magnets. Copper belongs to non -magnetic substances, so when the magnet is approaching, it will not produce adsorption force. Fake copper contains iron, and it will be quickly attracted when the magnet is approaching.n3 morenBleak
How to distinguish pure copper and alloy copper: . The easiest way is to "look at the color". Use a piece of fine sand paper to polish it on the identification object. The colors outside are different types of copper alloys. In order to judge the correctness of the color, you can find a lacquer wire or wire sand first, which are copper instead of copper alloy.
. The copper is composed of copper elements separately. Even if there are other metals, there are a small amount of impurities. Copper alloy is different. It is a alloy composed of copper and other metals. For example, copper -zinc alloy is brass, copper tin alloy is bronze, and the bronze is added to the bronze, and the copper aluminum iron alloy is aluminum -iron bronze and so on. . The application of copper is generally conducted, such as the flow row, wire and cable, lacquer cable, etc. The use of copper alloys is widely used, from screw nuts to waveguide, springs, reeds, early zippers, lamps, lighting, and so on. . The copper is softer, the extension rate is large, the copper alloy is harder, and the extension rate is slightly smaller.
How to distinguish pure copper and bronze: 1. Put the copper that is to be distinguished into dilute sulfuric acid or dilute hydrochloric acid;
2. Strong, CU's liveliness is weaker than hydrogen, so bubbles produce bronze, and no bubbles produce pure copper.
Put the two substances into dilute sulfuric acid or dilute hydrochloric acid. Because the livelyness of SN is stronger than hydrogen, CU's liveliness is weaker than hydrogen, so bubbles produce bronze.
Daily identification:
This black -hearted merchants to deceive consumers, plating copper colors through crafts, or other processes to make cheap iron as so -called pure copper. In fact, it is very simple. We can use its density, magnetic field and other identification.
The proportion of iron and copper is closer, but copper will not be attracted by magnets. Many people who acquire waste products use dedicated strong magnetic (abbreviation of powerful magnets) to determine whether it is pure copper.
of course, we can also test whether the items we buy are real pure copper from the horn at home or other items containing magnets. The greater the suction power, the more the iron content is.
Ittaisu raw materials that can be attracted by magnets are more expensive, and they will not join metal such as nickel and cobalt. Note: This method can only be determined that it must not be attracted by the magnet.
, but what is not attracted to the magnet is not necessarily pure copper, or it may be alloys added to other raw materials. For example, most of our daily life uses copper and zinc alloys, that is, "brass"
It pure copper colors are purple -red from the inside out, so they are called copper. For some wires, the color can be viewed on the appearance of the utensils. Generally, it is scraped off the outer layer, or the observation section is also the possibility of purple -red pure copper.
Pucting information:
Thenic copper is the name of the highest copper content, because the color purple red is also called copper, the main ingredient is copper and silver, the content is 99.5 ~ 99.95%; the main impurities elements: phosphorus, 铋 铋 铋, Platform, arsenic, iron, nickel, lead, tin, sulfur, zinc, oxygen, etc.; Used to make conductive equipment, advanced copper alloy, copper -based alloy.
This Chinese name pure copper
The most copper content of the interpretation is also called the main component of copper plus silver
n
Chinese copper processing materials can be divided into: ordinary copper (T1, T2, T3), anaerobic copper (oxygen copper, silver oxygen copper, cymbal oxygen copper, and diffuse oxygen copper), phosphorus dehydration copper, adding added Special copper (arsenic, copper, copper, silver, copper, and copper copper) with a small amount of alloy elements. Copper's conductivity and thermal conductivity are second only to silver, and are widely used to make conductive and heat -conducting equipment. Copper has good corrosion resistance in the atmospheric, seawater and certain non -oxidized acids (hydrochloric acid, dilute sulfuric acid), alkali, salt solution and various organic acids (acetic acid, citric acid) for chemical industry. In addition, the copper has good welding properties, which can be made into various semi -finished products and finished products through cold and thermoplastic processing. In the 1970s, the output of copper than other types of copper alloy was exceeded.
The theoretical value of pure copper resistance rate If various materials are made of 1 meter and 1 square millimeter of cross -sectional area, they measure their resistance at 20 ° C (called this kind of this type (called this kind of this kind of kind The resistance of the material) is compared, then the silver resistivity is the smallest, followed by the order of copper, aluminum, tungsten, iron, manganese copper, nickel chromium alloy, and the resistivity increases in order.
The resistivity of the aluminum wire is more than 1.5 times that of copper guide wires, and its resistivity p = 0.0294Ωmm2/m, copper resistivity p = 0.01851 ω · mm2/m, resistance resistance There will be some differences with temperature changes.
The method of distinguishing pure copper is to check hardness, look at the stubble, bending, and throwing method.
1, check hardness
The higher the color, the softer the quality, the more white and the surface. Take a copper bracelet of about 60 grams as an example. If you open it with your hand, there is no elasticity, and its color is about 95%; if it is a bit elastic, the color is about 80%-90%; %the following.
2, look at the stubble port
This cutting or folding to see the color of the stubble mouth. If the jewelry is soft, the stubble mouth is thick and soft, with a slight redness, the color is about 95%; if the hands are bent hard, the stubble mouth is white and gray, or slightly reddish, the color is about 90%; Larger, the stubble mouth is light red, yellow and white, or gray, with a color of about 80%; if the bend is hard, the stubble mouth is red, yellow, yellow, etc., and the color is about 70%; Or yellow in the yellow, the color is 60%.
3, bending method
M pinch with your fingers, soft and flexible in color, easy to bend and not easy to break; Finger folded; the copper of the copper is bent or knocked with a hammer a few times, and the fake will not be able to withstand the bend, which is easy to break.
4, throwing method
has high -colored copper jewelry, which is not high on the table, there is a sound of "click"; Very high, the sound of the sound is relatively crisp.
This Jewelry Jewelery has many attractive pure copper jewelry, including ring, bracelet, necklace, watch, arm belt, and almost as long as you can think of pure copper ornaments. It often has important aesthetic value to obtain health benefits from wearing. The best techniques of copper jewelry include trying different technologies and considering its completion. Unbuttoned copper, over time, the surface will become colorful. Two copper blocks and lines may be used to create interesting earrings, necklaces, bracelets and rings. rn扩展资料rn纯铜顾名思义就是含铜量最高的铜，因为颜色紫红又称紫铜，主成分为铜加银，含量为99.5～99.95%；主要杂质元素：磷、铋、 Platform, arsenic, iron, nickel, lead, tin, sulfur, zinc, oxygen, etc.; Used to make conductive equipment, advanced copper alloy, copper -based alloy.
Baidu Encyclopedia-Pure Copper
Pay content for time limit to check for freenAnswer 1. Putting the brass into a container with dilute hydrochloric acid (or dilute sulfuric acid). The bubbles appear on the surface are brass. 2. Pack into a container with sulfate solution in the sulfate. After a period of time, the color that changes the reagent color is brass. 3. Add silver solution to silver -white is brass. 4. Burning with fire, burning brass will become red.nAsk questions without the above conditions to verify? Anything else?nAnswer a momentnReply to you right awayn1 Look at color: Identifying copper can look at color. Pure copper is purple -red, brass is pale yellow, and bronze is close to white. Fake copper is generally packed by dyeing, and the original color will be exposed after losing the surface with a knife. 2 Listen to the sound: Identify the sound of copper, and gently knock on the surface of the copper. The real copper sound is low, and the sound of "buzz" will make the sound disappear slowly. The sound of fake copper knocking is sharp and disappeared faster. 3 Use magnets: Identifying copper can be used with magnets. Copper belongs to non -magnetic substances, so when the magnet is approaching, it will not produce adsorption force. Fake copper contains iron, and it will be quickly attracted when the magnet is approaching.n3 morenBleak
How to distinguish pure copper and alloy copper:
. The easiest way is to "look at the color". Use a piece of fine sand paper to polish it on the identification object. The colors outside are different types of copper alloys. In order to judge the correctness of the color, you can find a lacquer wire or wire sand first, which are copper instead of copper alloy.
. The copper is composed of copper elements separately. Even if there are other metals, there are a small amount of impurities. Copper alloy is different. It is a alloy composed of copper and other metals. For example, copper -zinc alloy is brass, copper tin alloy is bronze, and the bronze is added to the bronze, and the copper aluminum iron alloy is aluminum -iron bronze and so on.
. The application of copper is generally conducted, such as the flow row, wire and cable, lacquer cable, etc. The use of copper alloys is widely used, from screw nuts to waveguide, springs, reeds, early zippers, lamps, lighting, and so on.
. The copper is softer, the extension rate is large, the copper alloy is harder, and the extension rate is slightly smaller.
How to distinguish pure copper and bronze:
1. Put the copper that is to be distinguished into dilute sulfuric acid or dilute hydrochloric acid;
2. Strong, CU's liveliness is weaker than hydrogen, so bubbles produce bronze, and no bubbles produce pure copper.
Put the two substances into dilute sulfuric acid or dilute hydrochloric acid. Because the livelyness of SN is stronger than hydrogen, CU's liveliness is weaker than hydrogen, so bubbles produce bronze.