Effect of deep drawing on the performance of coil-coatings assessed by electrochemical techniques
By Bastos, A.C. & Simões, A.M.P.
Published in Progress in Organic Coatings
NULL
2009
Abstract
The effect of forming on the corrosion performance of coil-coated galvanised steel is studied. The study was made using the deep drawing geometry and the corrosion behaviour of formed and non-formed samples was compared, using electrochemical impedance spectroscopy (EIS). The responses of the various layers (zinc, phosphate and organic film) were observed separately. Formed samples suffer much faster degradation, in the form of blisters or of total delamination for phosphated and non-phosphated systems, respectively. The drop in the resistance values caused by forming in the phosphated samples revealed a transition from passive to active, whereas in the non-phosphated material the loss of resistance corresponds to an acceleration of the corrosion processes. The choice of the best equivalent circuits describing the impedance response is discussed.
Microsoft is Ending Support for Windows 7
Microsoft will discontinue support for Windows 7 on January 14, 2020 which means Gamry will also be discontinuing support for Windows 7. If you are upgrading to Windows 10, like many companies and institutions, you need to be running Version 7 of our s oftware . Please note that only USB and Ethernet-based instruments can run in Version 7. Eligible users can download the latest version of our software through our online Client Portal .
If you haven't already registered your instrument, you can do so through the Client Portal .
Please email Technical Support if you have any questions regarding this transition. Please be sure to include your instrument model and serial number when contacting us.