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Shopprimers provide a temporary protection to the mild steel metal construction exposed to corrosion of the environment during the phase of assembly. Unprotected parts of construction within this time period can corrode and produce a rising cost of surface preparation and building of the entire structure. In this paper different types of shopprimers are described with special attention given to their anti-corrosive properties during exploitation. Solvent and water based epoxy shopprimers as well as zinc-silicate shopprimer were tested for their corrosion resistance and influence on the weld quality. Welding over shopprimer can cause defects in a welding joint and lead to unpredicted additional production costs. In order to define the influence of the thickness and the type of shopprimer on the weld quality and corrosion resistance, specimens were submitted to radiographic and metallographic testing as well as accelerated corrosion study. The samples were prepared by Flux-Cored Arc Welding (FCAW).
shopprimers; welding; corrosion study
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