Reinforced concrete infrastructure frequently requires maintenance and repair before the designed service life is reached despite the fact that the structure complied with the durability design rules at the time of construction. A major reason is the corrosion of the reinforcement due to chloride exposure. One solution to overcome the problem is the use of stainless steel as reinforcement instead of carbon steel. There is a huge variation of stainless steels on the market with different levels of corrosion resistances. To enable the estimation of the structures’ service life and for the sake of comparability of steel type during design, it would be beneficial to determine the corrosion resistance of the reinforcing stainless steel. This paper presents a compilation and critical discussion of test methods for corrosion resistance of stainless steel from literature. An agreement of a specific standard test method with a high level of accuracy, repeatability and reproducibility is needed to quantify the advantage of using stainless steel in concrete.

Subject
Chloride threshold, Test methods, Rebar, Corrosion initiation, Corrosion testing, Corrosion cracking, Acidity, Steel, Corrosion resistance, Stainless steel, Pitting resistance equivalent number, Chlorides, Concrete
Keywords:
Stainless steel, corrosion resistance, chloride threshold, reinforced concrete
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2021
Association for Materials Protection and Performance (AMPP)
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