ã€China Aluminum Industry Network】 1. Chemical Polishing and Electrochemical Polishing Under normal operating conditions, aluminum materials tend to flatten the brightness of aluminum surfaces due to the cutting action of chemical liquids. After a certain period of time, the brightness of the aluminum surface no longer increases. There is only an equilibrium reaction of aluminum in a chemical solution. Exceeding this limit time, quality problems such as pitting, air flow, etc. may occur on the surface of the aluminum material.
2. The effect of hydrogen fluoride ammonia mist at a concentration of 160--180G/L. Ammonia fluoride reacts with the aluminum matrix and is automatically inhibited for about 40--60 seconds. If the haze effect is increased, the aluminum material must be acidic or alkaline. Activated 3, alkaline etching process in the production of hydrogen fluoride after some plants have alkaline etching process. Some factories directly use alkali plus sodium nitrate or sodium nitrite for alkaline etching. The sand surface will reach its limit under certain operating conditions. Sand surface effect will not increase.
4 Anodizing The general mechanism of oxygen pores is familiar at home. It should be noted that the oxide film is continuously dissolved by sulfuric acid during the formation process, and only the film formation rate is higher than the acid dissolution rate to generate the oxide film. There is a limit to this. At a certain current density, the dissolution and formation of the oxide film at a certain temperature is a dynamic equilibrium process. The film thickness will not increase any more. Different materials, different process limit film thickness is not the same.
5, the emergence of rainbow oxide film is due to the oxide film is too shallow.
6. When dyeing is done in dark colors, it will not be dyed deeply. That is, the oxide film absorbs dye molecules to reach a saturated and strong state, such as black, deep red, and the like. Sometimes some of the light colors will stagnate with the increase of the dyeing time when the dye concentration is low. Therefore, the dark color of the sample can be made to control the thickness of the oxide film to produce a limiting effect.
7. There are different materials on the same workpiece. Different aluminum materials will have a great influence on the surface treatment effect. For this phenomenon, the initial brightness of different aluminum materials can be approximated and then the subsequent process can be performed. This can reduce the difference in surface treatment effects due to material differences. 8. These phenomena have a reference role in the development of the sample, the determination of the process, and the design of the production line.
Loose Lay,Grain Indoor Easy Pave Flooring,Indoor Easy Pave Flooring Loose,Durable Indoor Easy Pave
DONGYANG MAOSHENG PLASTIC CO.,LTD , https://www.maoshengflooring.com