STAINLESS STEEL

STAINLESS STEEL

INTRODUCTION:

This is well known that distress in R.C.C. structure is due to corrosion of steel reinforcement bar. Efforts to protect steel through method including the use of sealant, coating, and membranes upgraded higher density concrete and additives, cathodic protection have failed to deliver long term maintenance free life structure.

Stainless steels derive their corrosion resistance from ready formation of stable, passive oxide film on the surface.

The solution, therefore, lies in providing corrosion resistant reinforcement bars. Stainless steels derive their corrosion resistance from the ready formation of a stable, passive oxide film on the surface. Even in aggressive conditions, any corrosion attack that may occur is usually in the form of pitting through the protective film, rather than generally overall attack found in carbon steel. Reducing the risk of general corrosion means that the expansive force from corrosion product growth, which causes spalling of the concrete cover in case of carbon steel, are minimized. Thus, stainless steels offer a solution to the single most important causes of deterioration in reinforced concrete structures – the corrosion of steel reinforcement. This helps building structures that easily last the design life of 80 years- 120 years, requiring little maintenance.


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