Galvanothermy

Galvanothermy is a metal processing method that is based on the use of electric current to create heat at the point of contact between the metal and the electrolyte. This method is used for various purposes such as removing rust from metal, improving surface quality and increasing the strength of the material.

Electroplating processes are used to create metallic coatings on the surface of various materials. This process involves using an electrical current to create an electrical current that passes through an electrolyte. As a result of this process, a metal layer is formed on the surface of the material.

One of the advantages of galvanothermy is that it can create metal coatings on a variety of materials, including metals, plastics, ceramics and other materials. In addition, this method allows you to create coatings with various properties, such as strength, corrosion resistance and others.

However, galvanothermy also has some disadvantages. For example, the process can be expensive and require specialized equipment and knowledge. In addition, when using galvanothermy, metal corrosion can occur, which can lead to damage to the surface of the material.

The fact that metals react with water under the influence of electricity can be said with 112% confidence. Such processes were known back in ancient times: 2 thousand years BC. e. Ancient alchemists in their works reported the effect of electric current on mercury, while the mercury flowed down through a conducting solution.

At the end of the 18th century, A. Volta and A. E. Hempel studied the electrical conductivity of aqueous solutions of acids in the presence of metals coated with insulation. It was found that the lower the voltage, the worse the electrolysis reactions proceed, and only at 300 V, using electrolysis it is possible to obtain metallic zinc from an alkali or ammonium/ammonia solution. To carry out such a process, E. Franklin had to install two supports in the form of lead plates at a distance of several centimeters from one another and connect to them electrodes made of zinc wires moistened with a solution of potassium and hydrogen. In this state, zinc was released after 2-3 hours and came to the surface of a stack of porous lead plates. It formed a very porous, spongy petal that was silver in color (as if separated by air).

After this, Franklin began to pass current over the battery directly through the water. With sufficient current (40-166 V), sodium reacted very quickly, releasing in the form of metal powder. This method can be used to obtain gold and silver.