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Twelve-year laboratory tests of rebar reinforced concrete beams partially submerged in artificial seawater have confirmed that steel corrosion may occur a few months after immersion and may continue for many years.
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HISTORICAL DOCUMENT. Procedures to control corrosion of conventional reinforcing steel in Portland cement concrete structures through the application of chloride extraction or realkalization.
Corrosion protective coatings deteriorate for a number of reasons including insufficient surface preparation and deficient thickness. This paper discusses the mechanisms of failure and provides a technical overview regarding the deterioration aspects of coatings.
This study focuses on a better understanding of pitting and crevice corrosion on coating surface damaged carbon steels in automotive applications. Immersion and cyclic polarization tests were conducted on bare and coated metals in a 5% NaCl solution.
Cementitious repair mortars are commonly used to rehabilitate deteriorated wastewater concrete infrastructure prior to the application of high-performance lining systems. These repair mortars occasionally receive a broom finish creating a “profiled” surface prior to the application of a trowel- or spray-applied protective lining system. Other recommendations require that that the cementitious mortars receive a blasted surface to impart a mechanical profile prior to topcoating with a similar lining system. In the following paper the author summarize the results of an investigation to quantitatively assess adhesion of a protective lining when applied to a broom finish surface verses a blasted surface.
Two concrete formulations, one of ordinary portland cement and one of pozzolanic portland cement, are compared by rebar corrosion criteria. Both formulations are candidates for nuclear applications whose durability requirement is higher than 300 years.
This paper presents a case study (an abutment wall built in 1961)for updating the corrosion probability with half-cell potential measurement data.