In the history of buildings and architectures it was often witnessed that metal dowels and other cramps were thus built with having a traditional masonry structure to be on the run with securing stones which may support the building from the happenings of a displacement such as of copings, cornices etc. Thus, in the olden days, the use of ordinary ashlar walls were to be remained at peace where a usual consistency of a thin faced fine dressed stonework would have done the work just with some bricks or backing up with some rubble where the cramps were thus adjusted to have a stronger backbone going up to the core of the building with cramps being the cause at the end of the day which would result in the fall of the buildings.
Hence, in the 19th century then to support these cramps wrought iron was build which was a susceptible feature against the process of corrosion which were to be exposed to air and moisture where the vertical joints were penetrated deeply and usually the shallow bead of the bottom was to be found of rainwater, cracks or decaying which would go around and inside the pipe easily which resulted in cramps and the creation of rust as well which eventually expanded the rust exerting pressure on the stone below which would eventually crack which resulted in the fall of the building. This process indeed required a conventional Structural Repairs technique which would fight the corrosion and cramps altogether.
Thus, the idea of Cathodic Protection to Buildings came into existence where the cathodic protection mainly was a technique which was used to suppress the process of corrosion on the metal structures. This process was indeed primarily used by the marine navy for many years as their ships are indeed submerged in the water and all the other oil pipelines and tanks are built deep down in the water where the corrosion protection was indeed required. The Cathodic Protection to Buildings technique was used in the navy at that period of time for 2 decades which then gave the reinforcement to apply the same in buildings and towers. The process has also been applied to iron and steel embedments rooted inside the brick, stone and masonry heritage buildings as well.
The process of cathodic protection mainly works on the principle that the process of corrosion is mainly an electrochemical reaction which is known to be a singular part of iron piece or steel in the moment which goes up to and acts like an anode while having the adjacent metals acting as a cathode. Thus as the anode corrosion starts the iron thus gives up its electrons and thus forms a soluble iron ion whereas the cathode, the electrons are thus released by the process of corrosion which goes ahead and combines with oxygen and water to form a hydroxide ion. Thus in the cathodic system thus a metal requires to be protected which is then forced to start act like a cathode with one side to be on the reaction surface of the metal with the another to be highly unaffected by the reaction possible where prevention of the corrosion process is thus to be taken. Hence, when one needs to protect the structural iron and the steel thus an achievement of applying it to the small DC electric currents is done through the building material. The whole process is a bit time consuming but indeed very important to jot down the possible risks in the future.
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