Is cobalt more metallic active than copper

Metal activity: potassium, calcium, sodium, magnesium, aluminum, zinc, iron, tin, lead, hydrogen, copper, mercury, silver, bowl, gold, from strong to weak, you can see the law in the metal activity table, cobalt's metal activity is stronger than copper.

No, you can look at the order of metal activity, cobalt is behind copper.

Iron metal is more mobile.

Iron is more reactive because in the periodic table iron and nickel are in the same cycle and iron is to the left of nickel, and because in the periodic table, the matter in the same period is less active the further to the right, it can be seen that iron is more active and nickel is less active than iron. Potassium, barium, calcium sodium, magnesium, aluminum, manganese, zinc, chromium, iron, nickel, tin, lead (hydrogen), copper, mercury, silver, platinum. In the metal activity sequence table, the lower the general position, the weaker the metallicity, and the weaker the reduction of atomic lead. The earlier the metal, the stronger the metallicity and the more reducible the atoms.

Both nickel and iron are moderately deficient in metal activity, but iron is slightly more active than nickel at room temperature.

Iron is a reactive metal that is susceptible to oxidation by oxygen and moisture in the air to form a surface oxide scale. Once the oxide scale is formed, it effectively prevents further oxidation reactions. Nickel also has some metallic activity, but in the air, it will continue to react with oxygen and be oxidized because it is difficult to form a stable oxide film.

In general, iron is slightly more metallic than nickel at room temperature, but as the temperature increases, nickel becomes more metallic active than iron. It is important to note that the activity of metals is a relative concept, and the specific activity depends on different environmental conditions and reaction processes. <>

By standard electrode potential:

co-2e=co2+

cu-2e=cu2+

Therefore, the metal activity of cobalt is much stronger than that of copper.

1. Cobalt content has an impact on the hardness of alloy properties: the main manifestations are that with the increase of cobalt content, the hardness of tungsten steel decreases, the wear resistance decreases, the bending strength increases, the compressive strength decreases, the thermal expansion coefficient increases, the thermal conductivity decreases, the elastic modulus and rigidity modulus decrease, and the fatigue strength limit increases.

2. It has an impact on the fracture toughness of the alloy: alloy producers know that when the alloy is fractured, the plastic deformation is mainly caused by the cobalt phase, the carbide deformation is very small, and the yield strength is extremely high, which has a strong restraining effect on the deformation of the cobalt phase. The fracture toughness of YG alloy is linearly related to the mean free square root path of cobalt phase.

The fracture toughness of the alloy with the same CO content is greater than that of the coarse-grained alloy than the medium-grained alloy.

3. It has an impact on the flexural strength of the alloy: the flexural strength of tungsten steel increases with the increase of CO content. When the CO content is greater than 10%, the flexural strength no longer increases with the increase of CO, but decreases slightly.

Cobalt is ferromagnetic, and the addition of cobalt to the alloy can improve the magnetic properties of the alloy; Cobalt has excellent high temperature resistance, cobalt-nickel alloy and cobalt steel alloy are often used as steam engines, rocket propulsion, gas engine impellers, missile parts, and are also used to make various high-load high-temperature resistant materials; Cobalt also has good wear resistance, and the front paws of some excavators are made of cobalt-iron alloy, which also has good acid resistance and is often used as an added element of acid-resistant alloys.