Analysis of Corrosion Prevention Measures for Reinforced Concrete in Cross-sea Bridges

Due to the bad environment and the poor anti-corrosion effect of reinforced concrete, cross-sea bridges is easy to cause bridge damage. Therefore, to ensure that the cross-sea bridge reaches a normal service life, a series of anti-corrosion measures must be taken to deal with reinforced concrete. This paper aims at the corrosion problem of cross-sea bridges and researches the protection effect of different anti-corrosion measures. At the same time, this paper provides a detailed understanding of the corrosion principles, application scenarios, and actual prices, based on which a comparative analysis of the whole-life costs of optional additional anti-corrosion measures is carried out. The paper concludes that the corrosion of concrete has both physicochemical effects and that the corrosion of steel reinforcement is dominated by the involvement of iron in the primary cell reaction. External coating protection can be applied to completed bridges, and corrosion-resistant reinforcement and concrete as well as applied current protection methods can be used for bridges under design. This paper analyses the corrosion of cross-sea bridges in general situation, systematically describes the respective corrosion mechanisms of steel and concrete in the marine environment, points out the specific advantages and shortcomings of the various types of corrosion protection measures for steel and concrete, and proposes that protection should be increased at the time of design rather than spending a large amount of money on repairs after the corrosion damage happened. Also, provide a guide in the design and maintenance of the overseas bridges.