| 1/00 | Electrolytic cleaning, degreasing, pickling, or descaling |
| 1/02 | Electrolytic cleaning, degreasing, pickling, or descaling Pickling; Descaling |
| 1/04 | Electrolytic cleaning, degreasing, pickling, or descaling Pickling; Descaling in solution |
| 1/06 | Electrolytic cleaning, degreasing, pickling, or descaling Pickling; Descaling in solution of iron or steel |
| 1/08 | Electrolytic cleaning, degreasing, pickling, or descaling Pickling; Descaling in solution of refractory metals |
| 1/10 | Electrolytic cleaning, degreasing, pickling, or descaling Pickling; Descaling in solution of actinides |
| 1/12 | Electrolytic cleaning, degreasing, pickling, or descaling Pickling; Descaling in melts |
| 1/14 | Electrolytic cleaning, degreasing, pickling, or descaling Pickling; Descaling in melts of iron or steel |
| 1/16 | Electrolytic cleaning, degreasing, pickling, or descaling Pickling; Descaling in melts of refractory metals |
| 1/18 | Electrolytic cleaning, degreasing, pickling, or descaling Pickling; Descaling in melts of actinides |
| 3/00 | Electrolytic etching or polishing |
| 3/02 | Electrolytic etching or polishing Etching |
| 3/04 | Electrolytic etching or polishing Etching of light metals |
| 3/06 | Electrolytic etching or polishing Etching of iron or steel |
| 3/08 | Electrolytic etching or polishing Etching of refractory metals |
| 3/10 | Electrolytic etching or polishing Etching of actinides |
| 3/12 | Electrolytic etching or polishing Etching of semiconducting materials |
| 3/14 | Electrolytic etching or polishing Etching locally |
| 3/16 | Electrolytic etching or polishing Polishing |
| 3/18 | Electrolytic etching or polishing Polishing of light metals |