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Native hard anodic oxide film
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Conversion coating type: Natural hard anodized coating
Application area: High-speed rail entrance step板
Partners: CRRC Zhuzhou, CRRC Qingdao Sifang, and CRRC Changchun Passenger Car Co., Ltd.
Advantages of the conversion coating: Hard anodized films on aluminum alloys are typically colored, but the design of high-speed train carriages mandates a silver‑white finish for the aluminum exterior—except for the door rails. Through advanced technological processes, our company has successfully achieved both exceptional hardness and superior wear resistance in 6000‑series aluminum alloys while maintaining the required surface hardness.
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Native hard anodic oxide film
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