The ancient application of leaching technology (including the origin of leaching technology):

In fact, the infiltration technology is not a modern society first used in ancient times, people have begun to use to carry out production activities infiltration technology, although its purpose and modern infiltration for different purposes, but this should be the oldest infiltration technique. But we have to admire the wisdom of our ancestors.

1、The most typical ancient impregnation technique is cutting huge rock technology:

In ancient times, there were no rock cutting machines, so what about the huge rocks needed for construction and decoration? In fact, since ancient times, people have mastered the infiltration technology and its principle is simple, some holes in the rock will dry stick into the hole, infiltration principle through a dry stick micro moisture absorption into sticks by people and it sticks started to swell, we know that the wood moisture absorption swelling pressure is very large, rely on the great efforts of its expansion of the rock burst, thus achieving the result of cutting the rock. Use a drying stick to absorb moisture, which should be the oldest soak technique.

2、 to prevent wood deformation of wood impregnation technology:

Wooden products due to drying or wetting and expansion, shrinkage, deformation, such as tools, wooden handle, handle and other wooden products deformed and loose, wooden deformation, etc.. To solve this problem, people solved the problem by dipping the resin into the interior of the wood after they were made of wood. The purpose of this infiltration is similar to that of modern wood impregnation and is still in use.

Contemporary application of infiltration technology 

1、 to prevent the military aircraft aluminum alloy casting parts microporous leakage:

The aircraft was successfully tested in 1905. It was used in the first World War in 1914-1918. Aircraft made of metal in the 1939-1945 world war second were widely used.

Aluminum Alloy metal plane casting parts due to pinhole porosity in the casting is invisible to the eye the shrinkage pores, this is because in the casting Aluminum Alloy produced gas and the gas to move around in the mold formed inside the material, or in the forming process of the cooling shrinkage caused by.

Depending on the characteristics of the pinhole, it may result in leakage from the inside of the component. Such as parts, shells, lubricating oil, grease, cooling water, gasoline, air, air conditioning, refrigerant, gas and other liquids and gases will leak. In addition, the infiltration of water from the outside will affect or even impair the function of components.

Therefore, the need for infiltration treatment, infiltration treatment is to make liquid infiltration agent into the pores of the casting internal, curing it, so as to prevent leakage of parts, oil leakage, water seepage and so on. This infiltration technique was applied to this aspect of the military industry in 1940. As in the United States is an important production process of military production, so the United States military enterprises and military management departments to develop infiltration standards, after several updates, updated infiltrant standard is MIL-I-17563C, is still in use this standard. The standard for infiltration treatment is MIL-STD-276A, which is still in use today.

2、 military transfers to civilian use:

Later in the car, motorcycle, train, ship, air conditioning and other household appliances industry, pumps and fittings and other hardware aspects of pressure casting and gear and electronic parts, powder metallurgy is also widely used in the batch production process of pressure die casting parts in general will produce about 8~50% parts leakage. If it is completely re cast, it will cost a great deal, so infiltration is widely used in civil enterprises. Therefore, infiltration treatment plays a key role in quality assurance and production cost reduction, and has become a very important production process.

3、 other applications:

It has also been widely used in electronic components and motor coil insulation and rust prevention of parts.

In addition, in improving the physical performance of parts, such as improving the cutting performance of parts to prolong the service life of cutting tools.

In addition, the metal surface treatment before plating, such as paint, spray process also used infiltration processing, electroplating, spray paint and spray can improve the quality of surface finish, will not produce spots, smooth, and can prolong the service life of the parts.