Eye Bolt Wall Anchor,Metric Brass Bolts,Wall Anchor Eye Bolt

Which bolts are prone to hydrogen embrittlement? How to prevent hydrogen embrittlement? Let's talk about what is hydrogen embrittlement of bolts.

The so-called hydrogen embrittlement phenomenon occurs only after the production process of bolts and the so-called hydrogen embrittlement treatment. The so-called topic is how to prevent the bolt from breaking after the conventional production process.

What is hydrogen embrittlement?

Hydrogen embrittlement refers to the state that the head of the Eye Bolt Wall Anchor is easy to brake suddenly due to improper stress treatment such as surface plating or quenching, and this phenomenon is still uncontrollable, so hydrogen embrittlement is a very serious quality problem.

Which bolts are prone to hydrogen embrittlement after galvanizing?

There is no doubt that it is Metric Brass Bolts. What are High Tensile Countersunk Bolts? That is, bolts with grade 10.9 or even above grade 12.9 are collectively referred to as High Tensile Countersunk Bolts. Because of the characteristics of the material itself, high-strength bolts are particularly prone to hydrogen embrittlement in the process of surface treatment.

High Tensile Countersunk Bolts are used in many automobile industries, and the environment of bolts in automobiles is also relatively bad. They are either in a super working state all day or in the open air all the time. Especially for High Tensile Countersunk Bolts after surface treatment, once the environment changes, the bolts will be more prone to hydrogen embrittlement.

How should we prevent hydrogen embrittlement?

The best way is not to galvanize the Square Head Bolts if the design allows. Of course, this is only a suggestion. Most of the time, this method is not feasible, so we have to solve it in other ways. If the hydrogen embrittlement is caused by the surface treatment of high-strength bolts, we can check whether it is caused by too long a pickling time during the surface treatment.

In addition, after the surface treatment is completed, we need to add another constant temperature treatment process, that is, the plated Wall Anchor Eye Bolt in a constant temperature furnace for two hours, which can effectively remove the phenomenon of hydrogen embrittlement.

If the hydrogen embrittlement is caused by excessive heat treatment, the process of heat treatment must be adjusted. Most of the hydrogen embrittlement of high-strength bolts caused by heat treatment is caused by too high a temperature. Adjusting the appropriate temperature can solve the problem.

When the bolt completes the necessary process, hydrogen embrittlement inspection is very important. We know that hydrogen embrittlement is sudden, so how to detect it? Samples can be taken and the head of the bolt can be knocked with a metal hammer to artificially induce hydrogen embrittlement of the bolt. If there is no fracture, it indicates that this batch of Square Head Bolts can still be used.

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