To monitor the corrosion rate of materials of boiler tubes in simulated waste incineration environment, A. C. impedance measurements were carried out for AIloy 625, SUS347H and STBA24 embedded in NaCl- KCl- Na2SO4 - K2SO4 -Al2O3 mixed synthetic ash deposit at 600°C. Though the ash includes some non-melting component, A. C. impedance measurements can be applied to evaluate corrosion rates in the same manner the corrosion of materials immersed in molten salts. Supposing the difference of impedance between the low frequency and high frequency ...
Keywords: waste incineration, high temperature corrosion, hot corrosion, chloride, sulfate, A. C. impedance measurement, corrosion monitoring