FIELD: chemistry.
SUBSTANCE: invention concerns engineering industry and can be applied in aircraft and power-producing turbine manufacturing for turbine blade repair. Method involves preliminary scale removal from parts, pickling treatment in solution and further removal of products of reaction between solution and coating elements. Electrolyte of the following composition, in wt %, is used as pickling solution: nitric acid 20-25, chlorine acid 4-6, potassium bichromate 9.6-11.6, ammonium molybdate 2.0-2.2, the rest is water. The process is performed at solution temperature under 20°C till total removal of heat-resistant coating.
EFFECT: improved yield of heat-resistant coating removal process, including diffusion zone, using pickling solution consisting of efficiently utilizable components, reduced power consumption of process.
1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF REMOVAL OF COATS FROM PARTS MADE FROM HEAT-RESISTANT ALLOYS | 2001 |
|
RU2200211C2 |
| METHOD FOR ELECTROLYTE-PLASMA REMOVAL OF PROTECTIVE COATING BASED ON ALUMINUM AND NICKEL FROM SURFACE OF WORKPIECE | 2023 |
|
RU2805723C1 |
| METHOD OF CONTROLLING WEAR OF COATS ON PARTS MADE FROM HEAT-RESISTANT NICKEL ALLOYS | 2009 |
|
RU2440878C2 |
| 0 |
|
SU1784661A1 | |
| METHOD FOR STRIPPING HEAT-RESISTANT COATINGS FROM METAL SUBSTRATE OF SOLID ALLOYS | 2019 |
|
RU2764042C2 |
| PROCESS OF REMOVAL OF COAT FROM METAL BACKING | 1995 |
|
RU2094546C1 |
| PROCESS OF REMOVAL OF HEAT-RESISTING METAL COAT | 2002 |
|
RU2228396C1 |
| METHOD OF ELECTROLYTIC-PLASMA REMOVAL OF COATINGS FROM PARTS FROM ALLOYED STEELS AND HEAT-RESISTANT ALLOYS | 2018 |
|
RU2694397C1 |
| 0 |
|
SU138123A1 | |
| METHOD FOR REMOVING COATING FROM METAL BASE | 2015 |
|
RU2590457C1 |
