Neutralizing Tank for Anodizing Production Line with 8-12 micro m Film Thickness

一. Product Description

1.Anodizing is a relatively inexpensive surface treatment compared to other metal finishing processes, making it a practical choice for a wide range of industries and applications.

2.Anodizing allows for a wide range of color options and finishes, from matte to glossy, enabling designers to tailor the aesthetic for various consumer and industrial products.

3. The anodized layer is much harder and more scratch-resistant than regular aluminum, improving the lifespan and performance of components in high-wear applications like automotive parts, cookware, and outdoor gear.

二. Design Condition

1. Alloy : Aluminium 6061 to 6063 or others
2. Anodizing film thinkness:10~ 12µm micron
3. Average coverage area: 350m²/T (ton)
4. Max aluminium profile length:6500mm
5. Extrusion ratio : 2.5kg/m²
6. Working hour/m: 300d/m x 20h/d = 600h/m
7.  Racking system: Three fixtures /rack
8. Racking operation : Manual
9. Equipment Usage Rate: 0.9
10. Power supply : AC 3phase 380v 50hz
11. Control Power : AC220V 50Hz
12. Water supply : 2kg/cm²·G
13. Hot steam : 6kg/cm²·G
14. Compressor air : 6kg/cm²·G

三. Process Tank

1. Degreasing 【Free sulfuric acid 180±30 g/l】                                                            1 Tank
2. Alkaline Etching【Free alkali 40-60g/l,Al3+ 30-120g/】                                       2 Tanks
3. Neutralization 【Free sulfuric acid180±20g/l】                                                    1 Tank
4. Anodising 【Free sulfuric acid 140-180g/l,Al3+≤20g/l】                                          5 Tanks
5.  Colouring 【stannous sulfate 3-8g/l,Free sulfuric acid 15-25g/l,PH 0.8-1.2】          3 Tanks
6. Medium Temperature Sealing【PH 5-6.5,Nickel ion0.8-1.3g/l,Fluorion0.3-0.7 g/l】 3 Tank 

四.Treatment Process:

1. Degreasing
   (1) 6jig(rack)/ tank x 1 tank=6jig(rack)
   (2) treatment time: 2-5min
2.  Alkaline Etching 
   (1) 6jig(rack) / tank x 2 tank=12jig(rack)
   (2) treatment time: 3-15min
3.  Neutralization
   (1) 6jig(rack) / tank x 1 tank=6jig(rack)
   (2) treatment time: 1-5min           
4.  Anodizing
   (1) 3 jig(rack)/tank x 5tanks = 15jig(rack)
   (2) Current density: 130A/m²
   (3) Process time: 30min
   (4) Unprocess time: 10min
   (5) Total time 30+10=40min      

          (6) Average anodizing layer : 0.36*1.3*30*0.77 =10.81um

5.  Colour 1

                     1) Clour process: Mix Salts

                     2) Quantity:3 jig(rack)/tank x 1tanks = 3jig(rack)

                     3) Current density: 70A

                     4) Process time: 2-8min

      6. Sealing
           1) Sealing menthod:  Sealing at Medium or Normal Temperature
           2) Quantity: 6jig(rack)/tank x 1 tank
           3) Process time 10-15min

五. Design Parameter and Setting

       1. Anodizing treatment area:
              1) Each anodizing process tank need 40min ,where total jig(rack)/year:​

                   ( 3 rack x 5 tank x 60min/h) ÷40min x600 hour =13500jig(rack)

2) Design 50m²^/jig(rack) . Where every tank is 100m²
3) Area treatment/year : 13500jig(rack)x 50m² /jig =675000m²

2. Anodizing treatment weight:
        Monthly output : 675000m²÷350m²/T*0.9=1735T≧1500T

3. Power consumption:
        1) Anodising Tank:100m²/tank* 130A/ m²÷0.9=14444A/tank

           Power Rectifier : 15000A =3unit
        2) Clouring tank: 100㎡/tank×70A/m²÷0.9 = 7777A/tank

   Colour Rectifier : 8000A =3 unit 

六. Process Chat

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