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Select fasteners for use in acidic environments

Mar 26, 2018

When considering selecting fasteners for a particular job, most people have a default type that they would consider, such as aluminum hex nuts. However, sometimes you may need to think more about the process of choosing.

For example, when you want to use fasteners in an acidic environment. In this case, you will find that most conventional metals are damaged by acid. The key to success is finding a metal that resists the type of acid you use.

For example, when selecting a fastener to be contacted with a concentrated sulfuric acid, you need to consider some of the things to choose from the best materials including:

of temperature Ambient temperature affects the behavior of sulfuric acid. Therefore, you need to take this into account when selecting the fastener for this application. Even a small change in temperature can greatly increase the corrosion rate of sulfuric acid, so this is something you can't ignore. Once you find out what the acid will be at the temperature, you will be in a better position to find out which fasteners you can use for the job. If you work with a high quality contractor, it will be easy to do this.

Some fasteners, such as titanium socket fixing screws, are often stabilized at most temperatures of sulfuric acid.

The concentration of the acid You also need to take into account the concentration of the acid when choosing a fastener to contact. The strange point of sulfuric acid is that when its concentration is more than 99%, there is no corrosive behavior. This means that you can use most fastener materials, including carbon steel. However, when diluted, it becomes more corrosive and produces a lot of heat. This basically means that if you want to have a system concentration, the acid will constantly change and you will need to use the fastener that can withstand the acid when it is most corrosive.

It also requires high temperature, so that it will not be affected by the exothermic process of diluting it.

Mechanical requirements The mechanical requirements of fasteners should always be considered when selecting. If the fastener will be subjected to very heavy load, the fact that they will contact the acid only may cause you to choose the weak fastener. In this case, although they are resistant to acid, they may eventually rupture.

To avoid this, you should always consider the mechanical implications of choosing a specific fastener. In short, if you want to use fasteners in an acidic environment, you should not have a size that fits all the mentality. There are many factors that affect the best type of fastener to use in a particular setting, and you need to consider all of these best results.

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