ABSTRACT
Since the seventies nickel-chromium-molybdenum alloys have been used as a protection against corrosion for components in environmental technology to an increasing extent. At present, the unreliability of organic base protective systems against corrosion increasingly results in specifications for new plants made of nickel alloys and stainless steels. In a technical research program it has been demonstrated that materials like Alloy C-276 (UNS N 10276) and Alloy 59 (UNS N 06059) can be hot roll clad on a carbon steel baseplate. On a technical scale large composite plates of 2.000 x 10.000 mm have been produced to a minimum thickness of the cladding material of 1.8 mm. All technical parameters, e.g. corrosion behavior, weldability and mechanical data, of these large composite plates easily meet the requirements of existing specifications. Therefore, an economically and technically acceptable alternative is available in the form of hot roll clad composites for flue gas desulfurization components, e.g. raw gas inlets, absorbers, clean gas ducts and chimneys.
