By corrosion is meant a natural process which converts a refined metal to a more chemically stable form, such as oxide, hydroxide or sulfite. Corrosion is the gradual damage of metal materials, usually caused by chemical or electrochemical reactions in an environment. In other words, chemical reactions between the metal and the environment occur during the corrosion process and as a result, the metal material deteriorates. On the one hand, the nature of the metal, on the other hand, the environmental conditions, in particular the liquids and gases that come into contact with the metal, have an effect on the shape and speed of deterioration.

All types of metals can corrode, which means they can corrode. In these pure iron materials rust very quickly. However, stainless steel combining iron and other alloys is stronger against corrosion. Precious metals such as gold, platinum and palladium are not easily oxidized and are less reactive than other metals. Therefore, they rarely rust. These are metals that can be found in pure form in nature.

There are several causes of metal corrosion. It is possible to prevent corrosion by adding alloy to a pure metal. Some metals can be prevented from rusting by careful combination of metals. The most common types of corrosion are general corrosion, localized corrosion and galvanic corrosion. The most common form of corrosion is general corrosion on the entire surface of a metal structure. It is caused by chemical or electrochemical reactions. General corrosion causes metal degradation, but is a preventable form of corrosion. Localized corrosion occurs only in certain areas of a metal structure. Small holes or cracks occur on a metal surface. Galvanic corrosion occurs when two different metals are placed together in a liquid electrolyte, such as brine. In this case, the molecules of a metal are drawn towards the other metal, and only one of these two metals is corroded.

According to research, most of the corrosion (almost percent 25) can be eliminated by well-applied prevention techniques. However, corrosion is not only a cost benefit, but also a health and safety issue. An effective corrosion prevention system starts with a thorough understanding of the environmental conditions and metal properties at the design stage. Engineers have to work with metallurgists on this subject. Possible chemical interactions between the metals used in surfaces and fittings must be known from the outset.

For long and trouble-free operation in an environment, it is necessary to be knowledgeable about the corrosion event and the effects of corrosion on the environment. By selecting the most efficient material for a particular application, significant material damage and component failures due to corrosion can be eliminated.

There are numerous standards taken into account in corrosion tests. By way of example, only a few standards in this regard are as follows:

• TS EN ISO 11463 Corrosion of metals and alloys - Evaluation of hollow corrosion
• TS 1299 EN ISO 6251 Liquefied petroleum gases - Determination of copper corrosion - Copper strip method
• TS EN ISO 12944 Paints and varnishes - Corrosion protection of steel structures with protective paint systems
• TS EN ISO 7539 Corrosion of metals and alloys - Tensile corrosion tests
• TS EN ISO 8565 Metals and alloys - Atmospheric corrosion tests - General specifications for field tests

Our company also provides corrosion testing services within the scope of other testing services. Thanks to these services, enterprises are able to produce more efficient, high performance and quality products in a safe, fast and uninterrupted manner.

Corrosion testing services provided within the scope of other testing services are only one of the services provided by our organization in this respect. Many other testing services are also available.