Probe controlled Degaussing system

Principle : Under Normal operating conditions the degaussing system is automatically controlled. However, if required, it may also be manually controlled by accepting a few restrictions. The external field changes acting on a ...

Deperming

In our previous posts we have discussed about degaussing and its process. However, a term ‘DEPERMING’ comes which is a way ahead for the degaussing process. When a ship is incapable to neutralise its permanent magnetism ...

Operation of Impressed current cathodic protection

Earlier, We had discussed about the theory behind the use of Impressed current cathodic protection. To refer the aforesaid post, visit http://electricalfundablog.com/blog/?p=731 . Lets discuss how the operation ...

Theory behind Impressed current cathodic protection

Impressed current cathodic protection is a method for ship’s hull protection. But, before discussing the Impressed current cathodic protection, its important to know the theory and history of cathodic protection. Cathodic Protection is a method ...

Sacrificial Anodes

In this type of system, the ship’s hull is forced to become a cathode with respect to electrodes that are positive with respect to the ship’s hull. The electrodes used for this purpose are Zinc, Magnesium ...

Hull protection methods

Paints alone cannot accord complete protection to underwater hull. Areas above keel blocks are not always possible to protect by painting. Stern areas suffer erosion due to high turbulence caused by propeller. In these areas, chances ...

Importance of Hull protection

If we go back in history, we can understand that the man has involved himself with works and resources of sea from a long time. He has been continuously improving and producing structures for using it ...

Degaussing coils

The potency of a magnetic field is measured in terms of Gauss. And therefore, by definition,  degausse means to reduce/eliminate the strength of the magnetic field. Degaussing coils are used to reduce the effect of ...

Ship’s induced magnetism

The magnetic field induced in the floating structure is dependent on the potency of the Earth’s magnetic field and the layout and direction of floating structure w.r.t. the Earth’s magnetic field. As discussed earlier, The ship’s induced ...

Ship’s permanent magnetic field

The Earth’s magnetic field is the cause of the ship’s permanent magnetic field. The process of constructing a ship in the Earth’s magnetic field generates an appreciable amount of permanent-magnetism in the floating metal structure. ...