Accelerated Corrosion Test to Study Atmospheric Corrosion on Steel Girder Bridges

Moran L.M. · Lecture Notes in Civil Engineering (2022) · DOI: 10.1007/978-3-030-91877-4_146

Resumen

Steel bridges are exposed to very aggressive environments and must resist dead and live loads throughout their entire service life; therefore, they require an adequate corrosion protective system. Atmospheric corrosion on steel members is a combination of physical and chemical processes that could take months or even years to develop, based on several factors. The requirement of such a long period of analysis, which also implies considerable expense, precludes the study of steel corrosion under real service conditions. An Accelerated Corrosion Test regimen based on a salt spray cabinet system under the ASTM B117-11 was used to reproduce atmospheric corrosion on steel coupons. The test regimen was applied to steel coupons to analyze and evaluate the performance of both steel washing and spot painting as effective options to reduce the rate of corrosion on steel girders. The results showed that steel washing is an effective alternative to reduce the rates of corrosion in steel members, while washing spot damage on coated steel members is not an adequate alternative. Spot painting with a simple commercial paint product resulted in significant corrosion protection.

Instituciones: Universidad Nacional Mayor de San Marcos