Unlock instant, AI-driven research and patent intelligence for your innovation.

Anodic oxidation treatment process for controlling efflorescence of oxide films on surfaces of aluminum products

An anodic oxidation and surface oxidation technology, applied in the field of alloys, can solve the problems that restrict the wide application of anodized aluminum materials and affect the aesthetics of aluminum materials, and achieve the effect of excellent uniformity of appearance and easy realization

Inactive Publication Date: 2018-06-15
CHINALCO RUIMIN +1
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after anodizing treatment, the powder frost formed on the surface of the aluminum material is called "powdering", and the powder frost can be reproduced after wiping off with a damp cloth, which affects the aesthetics of the aluminum surface and seriously restricts the wide application of anodized aluminum materials in high-end industrial fields. application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anodic oxidation treatment process for controlling efflorescence of oxide films on surfaces of aluminum products
  • Anodic oxidation treatment process for controlling efflorescence of oxide films on surfaces of aluminum products
  • Anodic oxidation treatment process for controlling efflorescence of oxide films on surfaces of aluminum products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Alkali cleaning treatment: immerse the aluminum material in 70g / L NaOH solution to remove the oxide film naturally formed on the surface of the aluminum material substrate, the alkaline cleaning temperature is 65°C, and the soaking time is 15s;

[0032] (2) Pickling treatment: immerse aluminum in 180g / L HNO 3 Solution, remove the residues on the surface of the aluminum material after alkali washing, the pickling temperature is 25°C, and the soaking time is 10s;

[0033] (3) Chemical polishing treatment: immerse the aluminum material in a solution of mixed acid (phosphoric acid: sulfuric acid = 4:1 (volume ratio)) to make the surface of the aluminum material smooth, the temperature is 100°C, and the soaking time is 50s;

[0034] (4) Pickling treatment again: immerse the aluminum in 200g / L HNO 3 solution to remove the surface residues of the aluminum chemical polishing treatment, the pickling temperature is 25°C, and the soaking time is 10s;

[0035] (5) Anodizing t...

Embodiment 2

[0040] (1) Alkali cleaning treatment: immerse the aluminum material in 70g / L NaOH solution to remove the oxide film naturally formed on the surface of the aluminum material substrate, the alkaline cleaning temperature is 65°C, and the soaking time is 15s;

[0041] (2) Pickling treatment: immerse aluminum in 180g / L HNO 3 solution to remove the residues on the surface of the aluminum material after alkali washing, the pickling temperature is 25°C, and the soaking time is 10s;

[0042] (3) Chemical polishing treatment: immerse the aluminum material in a solution of mixed acid (phosphoric acid: sulfuric acid = 4:1 (volume ratio)) to make the surface of the aluminum material smooth, the temperature is 100°C, and the soaking time is 50s;

[0043] (4) Pickling treatment again: immerse the aluminum in 200g / L HNO 3 solution to remove the surface residues of the aluminum chemical polishing treatment, the pickling temperature is 25°C, and the soaking time is 10s;

[0044] (5) Anodizing...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses an anodic oxidation treatment process for controlling efflorescence of oxide films on surfaces of aluminum products, and belongs to the technical field of alloys. Before anodicoxidation treatment, the aluminum products are anodically oxidized with sulfuric acid with a certain concentration as electrolyte after alkali washing, acid washing and chemical polishing; constant-current control is adopted; the current density is controlled within 1.0-2.5 A / dm<2>; the anodic oxidation temperature is 18-20 DEG C; the anodic oxidation time is 20-40 min; the thicknesses of films after anodic oxidation treatment are 3-20 microns; and the thicknesses are uniformly distributed (standard difference less than 1.0 micron). Coloring and hole sealing are performed on the oxide films;and no pulverization phenomenon occurs on the surfaces of the aluminum products.

Description

technical field [0001] The invention belongs to the technical field of alloys, and in particular relates to an anodic oxidation treatment process for controlling the pulverization of an oxide film on the surface of an aluminum material. Background technique [0002] After anodized aluminum alloy, its appearance can show a variety of colors, and has great application prospects in automotive interior parts, curtain wall decoration materials and structural appearance parts of consumer electronics. However, after anodizing treatment, powder frost is formed on the surface of the aluminum material, which is called "powdering". After wiping off with a damp cloth, the powder frost can be reproduced, which affects the aesthetics of the aluminum surface and seriously restricts the wide application of anodized aluminum materials in high-end industrial fields. application. Therefore, there is an urgent need for an anodic oxidation treatment process that controls the pulverization of th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C25D11/04C22C21/06C22C21/08
CPCC25D11/04C22C21/06C22C21/08
Inventor 郭振武高崇方小明江钟宇黄瑞银赵丕植
Owner CHINALCO RUIMIN