Dry cleaning, pickling technology Why is chemical treatment (pickling) necessary? Heat exchangers and piping systems Pickling of metal surfaces Why is chemical treatment necessary? Austenitic steel: The corrosion resistance of rust-resistant stainless steel is based on the formation of a very thin, chromium oxide-rich passive layer that is only formed on metallically pure stainless steel surfaces. Scale layers, welding and annealing colors, ferritic impurities (e.g. abrasion), mechanical processing (e.g. grinding, blasting, etc.) prevent / impair the formation of a closed passive layer. Only professionally stained stainless steel surfaces and stainless steel weld seams therefore guarantee full corrosion resistance of the material and also offer a decorative metallic appearance. Ferritic steel: The VGB recommends chemical pickling and passivation of the system components prior to commissioning or after modification work on steam pipe systems and turbine gas pipes. Only properly pickled pipelines guarantee trouble-free and efficient operation of the system or its individual components. 2018 - 2021 © Copyright All Rights Reserved Cookies facilitate the provision of our services. By using our services, you consent to our use of cookies. OK

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