What Causes Corrosion of the Aluminum Profile Surface?

As an Aluminum Rack System Factory, share with you. The reason why we chose to use aluminum profile decoration is because it has a relatively stable structure and is more resistant to corrosion during long-term use. However, the surface of some Aluminum Profiles will corrode. This is mainly due to the fact that the proportion of the manufacturing materials of the aluminum profile is not used correctly during processing.

Aluminum Profiles

1. In the process of melting and casting, the addition ratio of magnesium and silicon is not appropriate. For example, some surplus silicon exists. In addition to a small amount of silicon existing in a free state, a ternary compound is formed in the aluminum alloy. These insoluble impurity phases or free impurity phases formed in the alloy tend to aggregate on the grain boundaries, and at the same time weaken the strength and toughness of the grain boundaries, becoming the weakest link with the lowest corrosion resistance, and corrosion originates from there.

2. In the smelting process, although the addition ratio of magnesium and silicon is within the range specified in the standard, sometimes the uneven distribution of silicon in the melt is caused by uneven and insufficient stirring, and there are localized enrichment and lean regions. It is directly reflected on aluminum profile products. When there is a small amount of free silicon in the aluminum matrix, not only the corrosion resistance of the alloy is reduced, but also the grains of the alloy are roughened.

3. Control of various process parameters during extrusion, such as excessive preheating temperature of the billet, improper control of metal extrusion flow rate, air-cooling strength during extrusion, aging temperature and holding time, etc., are liable to cause silicon segregation and freeing, so that magnesium And silicon does not completely become a Mg2Si phase, but some free silicon exists.

In short, if the aluminum profile is easy to corrode during use, it is still caused by the low quality standard of aluminum profile during production. Therefore, we should go to the regular manufacturer when selecting aluminum profile. Such aluminum profile will be more secure.

Teach you how to clean aluminum profiles

In the process of using aluminum profiles for a long time, we will find that the inside of it will become dirty easily, and we need to clean it at this time. In the cleaning process, we must pay attention to master the appropriate method, so that cleaning aluminum profiles will be relatively quick and simple. In order to enable everyone to better clean, we will teach you several methods of cleaning aluminum profiles, I hope it will be helpful to everyone.

Chemical cleaning: Chemical cleaning has high efficiency and stable quality. It is suitable for cleaning welding wires and small-sized, batch-produced workpieces. There are two types of dipping and scrubbing methods.

Mechanical cleaning: When the workpiece size is large, the production cycle is long, and multi-layer welding or chemical cleaning is contaminated, mechanical cleaning is often used.

Our company also has Aluminum Pipe Joint on sale, welcome to consult