I want to achieve a uniform appearance when directly applying black chrome to aluminum die casting.
Conditions for current density that result in a matte finish! A successful case of stable blackening of aluminum die-cast materials.
We would like to apply a blackening treatment to aluminum die-cast materials, but with other companies' plating, the black color did not develop well and resulted in a light gray appearance. As a workaround, we have been using oil to eliminate surface irregularities, which has been a concern. Therefore, we proposed to adjust the component ratio of black chrome plating to achieve a matte black appearance while maintaining the plating state. To also address cost reduction, we considered eliminating the nickel plating that was previously applied as a base layer and directly applying black chrome plating to the material, successfully achieving stable blackening of aluminum die-cast materials. 【Issues】 ■ The appearance of current products from other companies is uneven. ■ An additional step of applying oil becomes necessary. ■ Oil is not required for product assembly and becomes a cost-increasing factor. ● For more details, please visit our company website and contact us.
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basic information
【Proposal】 ■Balance of anhydrous chromic acid, nitrate components, and fluoride components ■Current density conditions to achieve a matte finish ■Development of pretreatment for direct plating ●For more details, please visit our company website and contact us.
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Company information
San Kogyo Co., Ltd. is fully committed to ensuring the realization of our quality goal: "To become a company that satisfies our customers through technological innovation, while striving for quality improvement and promoting continuous improvement activities." We excel not only in plating for steel and copper but also for aluminum and stainless steel. While developing new surface technologies, we aim to provide value by improving the quality of existing plating. We conduct mass production across a wide range, from zinc plating to gold plating. The surface treatments we handle are listed in our catalog, which you can download for confirmation. Additionally, we possess various analytical devices and conduct analyses in-house, so please check our technical capabilities.