Investigation of Corrosion Protective Layers in Thermal Energy Plants

by P. Crimmann, D. Bendix, G. Tegeder, M. Faulstich

Corrosion in the hot flue gas area of energy plants is a severe problem that often causes premature damage of components, e.g. boiler steels are mostly not stable in corrosive conditions in waste incineration plants. Thermal spraying is an alternative coating technology to the most usual process cladding, which has the potential to create cost-efficient protective coatings. Until now, there are still not enough experiences about quality assurance (porosity, oxides, adhesion) and long run behaviour inside the incineration plants with sprayed coatings.

Since many years, ATZ Entwicklungszentrum is involved in the development and/or advancement of materials, technologies, and applications of thermal spraying for corrosion protection. Currently, pipes, coated with different materials and different technologies are tested by different strategies (corrosion tests under laboratory scale and/or directly in incineration plants).

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