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As a protective facility to ensure the safety of citizens or to guide the traffic flow, guardrails are almostvisible everywhere in modern cities. The most commonly used material for roadside guardrail systemsis steel. However, due to the influence of the marine environment, corrosion of roadside steel guardrailis ubiquitous in coastal cities, which not only damages the appearance and reputation of the city, butalso poses a potential security threat by largely reducing the service-life and strength of the guardrail.
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