ECAPARS
Corrosion and Electrical Control Systems Development Co.
History of cathodic protection
Cathodic protection was first introduced by Humphrey Davy in London in the midst of a series of papers he presented to the Royal Society. After a series of successful experiments, the first practical use of this new technology took place in the same year in the HMS Semming Navy. The basic structure of the system consisted of a sacrificial anode made of iron surrounded by a copper metal sheath (homogeneous main body of the ship) attached to the underwater body of the ship and the chemical reaction between iron and Copper was made, slowing down and protecting the copper metal around the iron rod. The scientist suggested that for the cathodic protection of vessels with copper body, pieces of iron should be installed as anode on the body of the vessel so that the surface ratio of iron to copper was 1: 1. In any case, one of the outcomes of cathodic protection was the growth and development of seafaring.
Because this new technology could accelerate the growth of seafaring, which led to fundamental and fragile changes in the use of ships built at the time, the British Royal Navy decided to abandon the technology in a conservative way. And he preferred to repair the rotting copper bodies of ships. After him Edmund Davies cathodically protected floating instruments and devices in the sea by installing pieces of metal, Robert Malt made a four-year alloy of zinc that was used as scrap anodes. The use of corrosion-resistant anodes continued until stainless paints were gradually developed and used for cathodic protection as well as cost savings.
The use of zinc coatings on steel has been common since ancient times (before 1), but the use of electric current for cathodic protection of pipes and underground installations began around the year 8 and expanded rapidly so that today almost all pipelines And underground cables are used. Cathodic protection is also used in many other cases, such as valves, ducts, water coolers, submarines, water tanks, slings and offshore installations, devices and various means of contact with chemicals.