This master’s thesis deals with the properties of highstrength steels, mainly with their resistance to corrosion. It describes discusses different types of corrosion and the possibility of protecting materials against corrosion. The thesis also evaluates compares the cost of corrosion protection by using coating and hot dip galvanizing. It describes describes the principles of degreasing and pickling, which is used as an adjustment before hot dip galvanizing. It evaluates there are many procedures for hot dip galvanizing, such as wet, dry or spin method, which is used for small parts. This thesis also evaluates the change of mechanical properties of steels: Hardox 500, Weldox 700 and 500 Weldox after hot dip galvanizing.