Metal materials pass through many different manufacturing technologies than are delivered to customers in the form of a finished product. These technologies can improve the properties of the material, but in the wrong choice and the process of execution, the material may be disturbed enough to cause it to be subsequently damaged. In this article we provide results of measurements of increased brittleness of steel materials due to diffused hydrogen formed on the surface of samples in surface treatment technologies by degreasing, pickling and tumbling. To detect hydrogen embrittlement was developed a simple device for cyclic loading of samples, since industrial products are often exposed to stress just this and it is important to be able to embrittlement this quickly and inexpensively detect. The hydrogen embrittlement is very susceptible mainly of high strength steel. These steels are used in the automotive and aerospace industries, so it is necessary to have an idea of how and when the brittleness of these steels occurs in order to prevent to this damage.
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