ANALYSIS OF CORROSION MECHANISM OF SPRINKLER PIPING AND CORROSION PROTECTION

Corrosion and Cathodic Protection in Underground Piping Systems

THE GALVANIC CELL The major corrosion concern in the water works industry is “galvanic” corrosion. Galvanic corrosion takes place due to current flow in a “galvanic cell” which is defined as (1) two dissimilar metals, an anode and a cathode, (2) in electrical contact with each other and (3) a common electrolyte. A galvanic cell is produced when the pipeline components come in contact with the s...

VIII-Metals-J-Corrosion protection-1_ CORROSION PROTECTION OF METALS

Nearly all metals, with the exception of gold and platinum, will corrode in an oxidising environment forming compounds such as oxides, hydroxides and sulphides. The degradation of metals by corrosion is a universal reaction, caused by the simple fact that the oxide of a metal has a much lower energy than the metal itself. Hence there is a strong driving force for the oxidation of metals. For ex...

Corrosion and Cathodic Protection Theory

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Corrosion in Sprinkler Pipe – Not One but Many Problems

The occurence of corrosion is a potentially major problem for all sprinkler systems. It could cause a problem for the operational reliability as well as for the performance reliablity. It is of course negative for the operational reliability if corrosion causes plugged piping, clogging of control valves or simply non-opening sprinkler heads. All of which may well be the effect of uncontrolled c...

An Enhanced Corrosion Protection Mechanism for Rubber-to-Metal Bonding