Matters needing attention in the post-oxidation process of aluminum profiles

Published Time:

2018-11-27

Four points to note in the post-oxidation process of aluminum profiles: (1) Hot water washing. The purpose of hot water washing is to age the film layer. However, the water temperature and time must be strictly controlled. If the water temperature is too high, the film layer will become thinner and the color will become lighter. If the industrial aluminum profile is processed for too long, similar problems will occur. The suitable temperature and time are: temperature 40～50℃, time 0.5～1MIN. (2) Drying. Natural air drying is preferred. The workpiece, after being rinsed with hot water, is hung obliquely on the rack to allow the free water on the surface of the workpiece to flow vertically downwards. The water droplets at the lower corners are wiped away with a towel. The color of the film layer dried in this way is not affected.

Four points to note in the post-oxidation process of aluminum profiles:

(1) Hot water rinsing. The purpose of hot water washing is to age the film layer. However, the water temperature must be strictly controlled. If the water temperature is too high, the film layer will become thinner and the color will become lighter. Prolonged processing of industrial aluminum profiles will also show similar problems. Suitable temperature and time are: temperature 40～50℃, time 0.5～1MIN.

(2) Drying. Natural air drying is preferred. The parts are hung obliquely on racks after hot water rinsing, allowing the free water on the surface to drain vertically downwards. Water droplets at the lower corners are wiped off with a towel. Film layers dried in this way are not affected in color and appear natural.

(3) Aging. The aging method of aluminum profiles can be determined according to the climatic conditions. In sunny summer days, they can be exposed to sunlight; in rainy days or winter, they can be baked in an oven. Process conditions are: temperature 40～50℃, time 10～15min.

(4) Rework of defective parts. Defective conductive oxide film parts should be selected before the drying and aging processes, as the film layer is difficult to remove after drying and aging, and will affect the surface roughness of the parts. The author has done some exploration in process improvement. Through various experiments, it is found that the following method works well, the method is simple and does not affect the surface quality of the workpiece. The detailed process is as follows: First, the unqualified parts are clamped in the fixture used for aluminum anodic oxidation, and then the anodic treatment is carried out according to the method of aluminum anodic oxidation in sulfuric acid solution for 2～3min. After the film layer is softened and peeled off, it can be re-anodized after being slightly cleaned with alkali solution and brightened with nitric acid.

More Information:

Public Notice on the Environmental Acceptance Inspection of Phase Two of the 30,000-ton Annual Output Project for Porous Microchannel Aluminum Alloy Tubes

Public Notice on the Environmental Acceptance Inspection of Phase Two of the 30,000-ton Annual Output Project for Porous Microchannel Aluminum Alloy Tubes

2023-10-25

Public announcement of environmental impact assessment for a project to produce 30,000 tons of energy-efficient and environmentally friendly aluminum pipes and aluminum materials annually

Public announcement of environmental impact assessment for a project to produce 30,000 tons of energy-efficient and environmentally friendly aluminum pipes and aluminum materials annually

2023-09-13

Several common problems and solutions in the processing of industrial aluminum profiles

Having worked in the industrial aluminum profile industry for many years, I've often encountered several issues during the processing of industrial aluminum profiles. Today, I'll summarize these problems and explain some conventional solutions for your reference. 1. When the temperature is too low during the extrusion of industrial aluminum profiles, and the extrusion speed is too slow, the temperature of the profiles at the outlet of the extruder cannot reach the solution temperature, thus failing to achieve solution strengthening; Solution: Reasonably control the extrusion temperature and speed to ensure that the temperature of the profiles at the extruder outlet remains above the low solution temperature; 2. There are few fans at the outlet of industrial aluminum alloy profiles, and the air volume is insufficient, resulting in slow cooling speed and the inability to cool the industrial aluminum alloy profiles within a short time

2018-11-27

Manufacturing needs to embrace the internet to break through the encirclement

“Internet Plus Manufacturing” is a key issue in the current transformation of all traditional manufacturing industries. Germany proposed Industry 4.0, and the United States subsequently proposed advanced manufacturing, making advanced manufacturing a national strategy. China proposed “Made in China 2025”. All of this shows that if manufacturing cannot be internet-enabled, there is no way out. Recently, Haier was once again included in the Harvard Business School case library and received positive feedback from Harvard teachers and students. This shows that Haier’s exploration represents a direction, the path to internet transformation that all major global companies are seeking. Specifically, in terms of “Internet Plus Manufacturing”, Haier’s exploration is...

2018-11-27

What kind of air pressure is needed to clean aluminum materials?

Due to the increasingly complex purification processes and higher processing precision, the required temperature fluctuation range is becoming smaller and smaller. For example, in the lithography exposure process of large-scale integrated circuit production, the difference between the thermal expansion coefficients of the mask material (glass and silicon) is becoming increasingly smaller. A temperature increase of a 100-micrometer diameter silicon wafer to a certain degree causes a linear expansion of 0.24μm in the aluminum material, therefore, a stable temperature of ±0.1 degree is required. The required humidity is generally lower because products contaminated by human sweat will be polluted, especially as they are sensitive to sodium. Semiconductor factories should not exceed 25 degrees. High humidity generates...

2018-11-27

Matters needing attention in the post-oxidation process of aluminum profiles

Four points to note in the post-oxidation process of aluminum profiles: (1) Hot water washing. The purpose of hot water washing is to age the film layer. However, the water temperature and time must be strictly controlled. If the water temperature is too high, the film layer will become thinner and the color will become lighter. If the industrial aluminum profile is processed for too long, similar problems will occur. The suitable temperature and time are: temperature 40～50℃, time 0.5～1MIN. (2) Drying. Natural air drying is preferred. The workpiece, after being rinsed with hot water, is hung obliquely on the rack to allow the free water on the surface of the workpiece to flow vertically downwards. The water droplets at the lower corners are wiped away with a towel. The color of the film layer dried in this way is not affected.

2018-11-27

China will determine the future Asia-Pacific LNG landscape

Since Brzezinski proposed the concept of "geostrategic chess player" in his world-renowned book "The Grand Chessboard," any factor that can affect the changes in the regional power balance has become a focus of attention. Energy is naturally the focus of the focus. With the peak of the traditional oil age gradually fading, a different liquid fuel has begun to be carried on the giant ships shuttling across the world's oceans. It has become a new type of fossil fuel that can profoundly affect the global energy structure after oil, namely liquefied natural gas (LNG). When Brzezinski was still teaching at the Department of Political Science at Columbia University, he must...

2018-11-27

The company has independent import and export qualifications and is fully...

The company has independent import and export qualifications and has established a complete global sales network, with established relationships in the Middle East, East...

2018-11-23

The company has independent import and export qualifications and is fully...

The company has independent import and export qualifications and has established a complete global sales network, with established relationships in the Middle East, East...

2018-11-23