Product Info Inhibitors The solution for controlled pickling of iron and steel Advantages: Suitable for use on excessive contamination and oxide layers Significantly minimizes material loss from the components Reduces hydrogen formation Curtails pickling acid consumption Achieves a metallically clean surface Applications: Oxidized and/or welded steel parts Components are pickled in mineral acid to remove corrosion and scale as well as oxides and welding residues from the metal surfaces. To reduce the pickling attack on the base material to a minimum and prevent excessive hydrogen formation during the pickling process, small amounts of inhibitors are added. Chemetall offers a wide range of inhibitor technologies for a controlled pickling process. These technologies can be used for all scale and oxide removal applications on iron and steel and only differ in terms of the pickling acid involved. Inhibitors Selected technologies to reduce the pickling attack of mineral acid based pickling agents Atmospheric corrosion or the heat treatment of iron and steel lead to the formation of scale and corrosion layers on the metal surfaces. Moreover, oxide and welding residues lead to poor paint adhesion. To prevent this, the components are pickled with mineral acids. Whereas, in the case of uncontrolled pickling in non-inhibited acid, iron and steel continue to be dissolved after the iron oxides have been removed with formation of hydrogen, for controlled pickling the inhibited acids help to almost completely protect the cleaned bare metal surfaces against further acid attack. As a leading global player in surface treatment technology, Chemetall offers a portfolio of inhibitors that largely prevent the pickling attack on the substrate. Further customized solutions are available on request. Inhibition technologies Compatibility with Product Basis Application phosphating Surfactant-containing inhibitor for sulphuric acid Gardobond-Additive® H 8625 Thiourea and phosphoric acid based pickling agents Inhibitor for hydrochloric acid based pickling Gardobond-Additive® H 8629 Amine agents Inhibitor for sulphuric acid and Gardobond-Additive® H 8630 Thiourea phosphoric acid based pickling agents Inhibitor for hydrochloric acid and Gardobond-Additive® H 8641 Amine hydrofluoric acid based pickling agents Gardobond-Additive® H 8683 Thiourea Inhibitor for sulphuric acid based pickling agents Inhibitor with limited shelf life for Gardobond-Additive® H 8683/1 Thiourea sulfuric acid based pickling agents Gardobond-Additive® H 8683/2 Thiourea Inhibitor for sulphuric acid based pickling agents New Diol – Thiourea / CMR substance-free Gardobond-Additive® H 8650 Thiourea-free! for sulfuric acid based pickling agents Headquarters and Regional Head Office Regional Head Office Regional Head Office North America Asia-Pacific Europe, Middle East, Africa, Chemetall US, Inc. Chemetall Asia Pte Ltd. South America 675 Central Avenue 12 Loyang Crescent Chemetall GmbH New Providence, NJ 07974 Singapore 508980 Trakehner Straße 3 USA Phone: +65 6885 7900 60487 Frankfurt am Main Phone: +1 908 464 6900 [email protected] Germany [email protected] Phone: +49 (0) 69 7165-0 [email protected] www.chemetall.com www.chemetall.com The product information contained in this brochure has been compiled to the best of our knowledge on the basis of thorough tests and research work and with regard to the current state of our practical experience in the industry. This product information is non-binding. Our statements relating to possible uses of the product do not constitute a guarantee that such uses are appropriate in a particular user`s case or that such uses do not infringe the patents or proprietary rights of any third party. We assume no risk or liability whatever in connection with any particular use, if not expressly confirmed by us in writing. Therefore Chemetall grants no warranty and does not accept any liability in connection with this product information or its use. Except where noted otherwise, all registered trademarks are owned by Chemetall or its affiliated companies. The reproduction of any or all of the information contained in this brochure is expressly forbidden without Chemetall’s prior written consent. ® © 2014 Chemetall GmbH, Frankfurt am Main, Germany Gardobond is a registered trademark of Chemetall. CM-PI0186ENG-11.2014.