Konstantin Konstantinovich Khrenov
He is credited with the invention of underwater welding known as hyperbaric welding which is used on ships oil rigs and also pipelines, this is done by putting a flux on the weld at which the electrodes burn the flux. For its use in World war II he was accredited the award of Stalin State prize in 1946. He finished his schooling in electrochemistry in Saint Petersburg State Electrotechnical University. Khrenov spent most of his career creating inventions for welding techniques the science behind welding under water a nitrogen or argon bubble is blown. Some welding techniques only require electrodes. In his research he understood that the biggest hurdle was because of the sporadic bubbles that flowed under water.
Wet welding.
Welding circuit.
In this type of welding the the positive section of the electrode goes positive DC, there is a quick deterioration of the flux. AC cannot be used because it can travel too easily in water. The power needs to be around 300 or 400 amps. Ground must be connected to the ship in order for the electrodes too flow. A knife switch must be used for safety reasons.
The electrodes must be waterproofed so that the water cannot come into contact with the metal parts. If the water makes any contact with the metal than it will destroy the ark as the voltage will yield to the metallic conductor.
Underwater wet welding.
Dry welding.
Dry hyperbaric welding can be preformed at higher pressure the chamber filled with the gas mixture sealed around the structure. Most types of hyperbaric welding suffers as pressure increases. Dry water has been limited to less than 400m.
After the first successful wet weld due too the fact that metal was in such demand in Russia.
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