METHOD FOR PEELING CERAMIC HEAT INSULATION COATING FROM SUPERALLOY BASE BOARD HAVING ADHESION FILM APPLIED THEREON, METHOD FOR REGENERATING CERAMIC PART AT HEAT INSULATION COATING APPLIED ON GAS TURBINE PART, AND REGENERATED GAS TURBINE PART

摘要

PROBLEM TO BE SOLVED: To provide a means to peel the ceramic heat insulation coating of a gas turbine part without corroding an adhesion coating. SOLUTION: First, most of a ceramic layer is peeled through wet type chemical treatment using a chemical solution and an autoclave device. A treatment condition is carefully controlled so that a ceramic layer is peeled without corroding or peeling an adhesion coating through the chemical treatment. Secondly, at a mechanical polishing step, all of a remaining ceramic layer and an adhesion coating having thickness higher than that of the part, where chemical properties are changed through chemical treatment, of the adhesion coating are peeled.