Must do derusting and to oxidation film processing, generally use chemical polishing or electrolytic polishing.
必须先做除锈及去氧化膜处理，一般使用化学抛光或电解抛光。
2
Thorough cleansing of joints and surfaces to remove electrolytic residue, including PC etchants, body salts, and processing chemicals, will minimize the effect of these parasitic batteries.
The companies cut down more than 30% of energy consumption per unit of production of alumina, ethylene and caustic soda, and over 10% for crude-oil processing, electrolytic aluminum and cement.