Sulfuric anodizing

hardaluminumaluminum alloy

Hansheng Automation's black anodizing service, combined with CNC machining, provides a one-stop solution from parts manufacturing to surface treatment. It can process various aluminum alloys, giving parts a durable, non-fading surface, high wear and scratch resistance, and high corrosion resistance. It also supports color customization, small batch/R&D sample services, and partial masking, and follows strict quality control standards. Product Features and Advantages - Durable Surface Treatment: The Black Anodized surface, achieved through precision dyeing and sealing technology, allows the color to penetrate deeply into the oxide layer, ensuring long-lasting colorfastness. - Improved Product Physical Properties: The anodized layer significantly enhances the wear resistance and scratch resistance of anodized aluminum components, extending their lifespan. - High Corrosion Resistance: Treatment of Black Anodized Aluminum Components allows them to be used directly in harsh environments such as humidity and salt spray, reducing maintenance costs. Our professional technical and service capabilities - Multi-Color Solutions: In addition to being a Black Anodizing Companies Services provider, we also offer a wide range of Color Anodizing Services, including classic black, hard natural finishes, and other custom colors. - One-Stop Integrated Services: We provide a one-stop service from "CNC Machining" to "Anodized Aluminum | CNC Machining". You can entrust both finishing and surface treatment to us, saving time and communication costs. - Diverse Material Handling Capabilities: We excel at handling various types of aluminum alloys, such as Black Anodized Aluminum Sheets, profiles, and precision machined parts. We can optimize process parameters based on the material properties to ensure optimal results. Technical parameters and quality control Parameter Items | Type II Anodizing | Type III Hard Anodizing - Oxide Layer Thickness: 5 - 25 μm (Customizable) | 25 - 50 μm, above 50 μm - Surface Hardness: 300 - 400 HV | ≥ 500 HV (Approx. ≥ 60 HRC) - Main Applications: Casings, Decorative Parts, Consumer Electronics | Transmission Components, Hydraulic Systems, Military Parts - Color Options: Deep Black and Other Color Anodizing | Deep Bronze to Black, Durable Color - Corrosion Resistance: Passed Neutral Salt Spray Test for ≥ 336 Hours | Passed Neutral Salt Spray Test for ≥ 500 Hours - Abrasion Resistance: Complies with ASTM D4060, Abrasion Grade "H" | Complies with ASTM D4060, Excellent Abrasion Grade, Far Exceeds Type II - Dimensional Impact: Uniform Coating, Approximately 50% of the Film Thickness Increased on One Side | Thick Coating, Will Significantly Change Part Dimensions, Require Reservation in Design FAQ - Q: What are the fundamental differences in process and performance between black anodizing and black painting? A: Painting: A surface deposition process that applies a polymer coating to the substrate surface. Black anodizing: An electrochemical conversion process. A dense alumina ceramic layer is grown on the aluminum substrate. Dye is deposited into the micropores of the film through physical adsorption, and finally, the pores are sealed. - Q: Do you offer anodizing services for small batches or R&D samples? A: Yes. We promise to adhere to the same stringent quality control standards regardless of order size. - Q: Are all aluminum alloy series suitable for black anodizing? Will the results be consistent? A: In principle, most aluminum alloys can be anodized. However, differences in elemental composition (such as copper, silicon, and manganese content) among different alloy series will result in significant differences in oxide film structure, thickness, and final color. For example, 2000 series alloys (containing copper) will have a yellowish-brown color after anodizing, while 6000 series alloys are easier to achieve a deep, uniform black. We recommend providing the specific alloy grade before placing a formal order so that our engineers can provide an accurate assessment of the expected results and a process plan. - Q: Do you offer anodizing services in colors other than black? A: Yes. We offer comprehensive colored anodizing services, covering a variety of standard colors including blue, red, gold, and green. We also support customized color development based on color samples or Pantone color codes provided by clients. - Q: What impact does the anodizing process have on the critical dimensions of parts? A: It will have an impact. The anodized film grows approximately 50% inwards and 50% outwards. For example, a 25μm film thickness will increase the dimension on one side of the part by approximately 12.5μm. For mating surfaces with strict tolerance requirements, we strongly recommend incorporating this film thickness increase into the design considerations during the early machining stages. - Q: Can you achieve localized anodizing masking of specific areas of a part? A: Yes. We have mature local masking technology that can effectively protect designated areas such as threaded holes, conductive contact surfaces, and high-precision mating interfaces, ensuring that these areas are free of oxide layer coverage and maintaining their original geometric tolerances and physical properties. Please provide drawings clearly indicating the masked areas in your inquiry. Technical Specifications / Features - Durable, non-fading black anodized surface - High wear and scratch resistance - High corrosion resistance (neutral salt spray test ≥ 336/500 hours) - Color customization available - Supports small batch and R&D sample services - Partial masking available - Strict quality control standards - Oxide layer thickness: 5-25 μm (Type II), 25-50+ μm (Type III) - Surface hardness: 300-400 HV (Type II), ≥500 HV (Type III) - Applications: casings, decorative parts, electronics, transmission components, hydraulic systems, military parts - Complies with ASTM D4060 abrasion standards