Calcium bromide is used in the coal fire power plant industry to help control mercury emissions. The objective of this study was to determine the effect of bromide additions in chloride-rich Wet Flue Gas Desulfurization slurries on the crevice corrosion resistance of commercially-available corrosion resistant alloys.
Within many features of the Electro Slag Strip Cladding (ESSC) technique, one of the most attractive is the opportunity to achieve a required clad metal chemical analysis in one single layer. All these CRA 308L, 316L, 347, 625 & 825 types frequently concern fabricators who are constantly demanding for ways to reduce production costs & thicknesses of CRA. Hence, new low dilution and high-travel speed solutions have been developed with the aim to reduce the thickness and/or the number of layers in order to answer to industry expectations in terms of productivity. Through controlling dilution with the parent metal and balancing the chemistry by means of the new fluxes, it has been possible to achieve high quality results with an iron content Fe <7% & Fe < 10% for 625 cladding in a single layer where traditional ESSC requires two layers for the same objective. Also, for Alloy 825, single and thin layer solutions have been achieved. This subject presents an overview of these new developments with details on the applied welding conditions and the quantitative results achieved, showing benefits in terms of material savings and productivity gains.