Hard anodizing of pistons
Successful Partner: Harbin Dong’an Liyuan Piston Co., Ltd.
Sanrong provides it with hard anodizing process technology and hard anodizing equipment.
Advantages: Rapid oxidation and fast film formation—20–30 μm of coating can be achieved in 120–180 seconds; high degree of automation; simple process requiring only one operator; excellent yield of good-quality parts; and zero waste generation.
1. Piston cleaner
It exhibits strong penetrating, decomposing, and loosening effects on release agents, oil grime, and oxide layers, enabling thorough cleaning and brightening in a single step. It is non-corrosive to pistons, leaves no streaks or watermarks, and features a high‑tech, environmentally friendly formulation that is recyclable and produces no wastewater.
2.****** Film-forming additive
It effectively increases the current density, thereby enhancing both the film‑deposition rate and the hardness of the oxide layer, achieving a deposition rate of up to 10 μm/min without discoloration or burning. The resulting oxide film is hard, highly wear‑resistant, low in cost, and requires minimal consumption.
3. Hard Oxide Temperature-Raising Additive
It contains advanced ternary organic acids that effectively reduce the dissolution of the oxide film by the electrolyte, thereby enhancing film‑forming efficiency. The electrolyte exhibits a wide operating temperature range, facilitating continuous production of oxide films with low porosity, high hardness, and excellent wear resistance, extending the service life of the bath, and significantly reducing material consumption while improving production efficiency.
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