The first industrial revolution took place in the 1860s and ended in the 1840s. The industrial revolution led by Britain first spread to Western Europe and North America, and then spread rapidly to the whole world. This revolution has not only promoted the development of the world economy, but also accelerated the development of cities and improved the quality of life of people. It is a very important link in the process of human history.

Every technological innovation will bring about drastic changes in the market, change the share of existing products and subvert the existing market pattern.

Introduction to durable metal elements

Titanium is a chemical element. Its chemical symbol is Ti, which has metallic luster and ductility. The density is 4.5 g/cm3. Melting point 1660 ± 10 ℃. The boiling point is 3287 ℃. The main characteristics of titanium are low density, high mechanical strength and easy processing. The plasticity of titanium mainly depends on its purity. The more pure titanium, the greater the plasticity. It has good corrosion resistance and is not affected by the atmosphere and sea water. Under normal temperature, it will not be corroded by hydrochloric acid below 7%, sulfuric acid below 5%, nitric acid, aqua regia or dilute alkali solution; Only hydrofluoric acid, concentrated hydrochloric acid and concentrated sulfuric acid can act on it.

Chromium is a chemical element. Its chemical symbol is Cr. It is a silver-white shiny metal. Pure chromium has ductility. Chromium containing impurities is hard and brittle. Density 7.20g/cm3. Soluble in strong alkali solution. Chromium has high corrosion resistance. In the air, even in the red heat state, the oxidation is very slow. Insoluble in water. Plating on metal can play a protective role.

Copper is a transition element, chemical symbol Cu, English copper, atomic number 29. Pure copper is a soft metal. When the surface is just cut, it is red and orange with metallic luster, and the simple substance is purplish red. It has good ductility, high thermal conductivity and conductivity. Therefore, it is the most commonly used material in cables, electrical and electronic components, and can also be used as building materials, which can form many kinds of alloys. Copper alloys have excellent mechanical properties and low resistivity, of which bronze and brass are the most important. In addition, copper is also a durable metal, which can be recycled many times without damaging its mechanical properties.

Zinc is a chemical element, its chemical symbol is Zn, its atomic number is 30, and it is in the fourth period and IIB group in the periodic table of chemical elements. It is a light gray transition metal. Zinc has excellent atmospheric corrosion resistance and is easy to form a protective film on the surface at room temperature. Therefore, zinc is most widely used in the zinc plating industry. It is mainly used for surface coating of steel and steel structural parts (such as galvanized sheet), and is widely used in automobile, construction, shipbuilding, light industry and other industries.

Magnesium is a chemical element, its chemical symbol is Mg. Magnesium is one of the lightest structural metal materials, and has the advantages of high specific strength and stiffness, good damping and cutting ability, and easy recovery. Magnesium alloy is applied to the automobile industry at home and abroad to reduce weight, save energy, reduce pollution and improve the environment. Its structural characteristics are similar to that of aluminum. It has various uses of light metal and can be used as alloy material for aircraft and missiles.