Title: +038=67.011-##026._02-Pos 63a Elektrisk Grill Brukermanual.pdf
Chromium steels have favourable thermal engineering properties. They are less prone to warping when exposed to heat. Chromium-nickel steels, on the other hand, have generally more favourable corrosion properties. The corrosion resistance of stainless steels is based on a passive layer which is formed on the sur- face when oxygen enters. The oxygen in the air is already sufficient to form the passive layer, so that any disturbances or injuries to the passive layer caused by mechanical action are automatically repaired. The passive layer is formed more quickly or newly when the steel comes into contact with flowing oxygen-containing water. A further increase of the effect is achieved by oxidizing acids (nitric acid, oxalic acid). These acids are used if the steel has been subjected to high chemical stress and has therefore largely lost its passive layer. The passive layer can be chemically damaged or disturbed by reducing (oxygen-consuming) agents if they are concentrated or hit the steel at high temperatures.