Rostfria stålkonstruktioner och rostskyddsbehandling av stålkonstruktioner enligt Eurocode

Sammanfattning: Steel is an excellent material to build with, but consideration must be given to the fact that unprotected steel corrodes, rusts, therefore, as a rule, the steel must be protected in some way. This can be done by reducing the tendency of the steel to corrode by using stainless steel or by treating the steel with a protection method. The two most common methods of protection are corrosion protection paint and zinc coating. To determine the method, the corrosive category must first be evaluated and this is done in accordance to EN ISO 12944-2:1998. Stainless steel is available in many varieties but only some of them have properties that make them suitable for use as construction steels. There are many factors to be considered in the design of stainless steel to prevent corrosion from occurring. Design of stainless steel is slightly different from the design of plain carbon steel. In this thesis, only the differences are considered. There are many different systems of protective coating. These consist of at least two different layers of paint. Before the steel is painted, it must be pretreated to remove any impurities in the steel in order to get good adhesion. Galvanizing with a zinc coating can be done in a couple of ways, including hot-dip galvanizing and zinc spraying, where galvanizing is the most common method. When both galvanizing and painting is used it is called duplex systems. Which method that should be used depends on several factors such as economics, aesthetics and environmental impact. There is no simple solution, everything must be weighed and considered in each individual case.