Reinforced concrete structures are susceptible to chloride ion attack under different conditions, such as water reservoirs, coastal regions, and industrial locations. The physical and mechanical properties of concrete are known to considerably affect the ion penetration velocity. However, studies addressing the effect of coatings on the chloride ion penetration of reinforced concrete are limited. Thus, the objective of this paper is to evaluate the effects of different surface coatings on chloride ion penetration in concrete elements. Acrylic, polyurethane, and epoxy resin coatings were applied in two layers as recommended by the manufacturers. Natural environment chloride ion exposure was conducted in loco in the city of Torres, Brazil, at two marine locations with different geographical characteristics and distances from the sea. In addition, laboratory tests consisting of salt spray and penetration-by-immersion tests were conducted. The concrete's characteristics, including its compressive strength, water absorption, and void index, were evaluated. The results indicate higher efficiency with the polyurethane coating, while the acrylic resin had the worst results, with a difference of up to 4.5 mm between them.