...Abstract The objective of this study was to relate the results from electrochemical impedance spectroscopy (EIS) collected in 24 hours to salt spray exposure data collected over 1500 hours for conversion coated metal surfaces. To develop such a relationship, an approach based on artificial neural...

... protective measures. [ 1 - 5 ] Of particular value is the use of CIs for improving the conversion coatings, CCs. [ 6 - 15 ] The mechanisms of the formation of some CCs and that of the inhibition are alike in many respects, e. g., the phosphate CCs are prepared with the use of concentrated solutions...

... substrates were immersed into Alodine 1200 solution for 2 minutes to yield a uniform, golden conversion coating on the surface. In order to produce Cr(III) conversion coatings, AA substrates were sprayed with the trivalent chromium solution for 10 minutes or immersed in the solution for 5 minutes...

... 1255 frequency response analyzer. Two impedance spectra were collected from separate locations on each panel. RESULTS AND DISCUSSION Salt spray test results Abstract The corrosion resistance of 33 different conversion coatings applied to five different aluminum alloys was tested by salt spray...

...Abstract Many military applications require that conversion coatings for aluminum alloys provide high corrosion resistance while retaining low electrical contact resistance. In this paper, the performance requirements for Class 1A and Class 3 conversion coatings established in Military...

... as more than a mere surface coating. Abstract A cooperative research project sponsored by the National Center for Manufacturing Sciences (NCMS) is evaluating chromate-free conversion coatings on several aluminum alloys for their suitability for a range of potential applications. Participants...

...Abstract A corrosion resistant chemical conversion coating on aluminum alloys was developed using a trivalent chromium bath. Electrochemical impedance spectroscopy and dc-polarization measurements were made to determine the nature of the surface films formed. The results showed a 10 to 100 fold...

...Chromate conversion coatings for corrosion protection of aluminum alloys in aggressive saline environments have been used by industry for 40 years. However, the use of chromate conversion coatings is becoming limited by environmental issues dealing with the release of chromium into the environment...

... will be presented. Corrosion Electrochemical Measurements Oxygen Corrosion Aqueous Corrosion Atmospheric Corrosion Phosphatizers Conversion Coatings Corrosion Inhibitors Rust Proofers INTRODUCTION Laboratory evaluation of the mechanistic details of inhibitors at a molecular level, characterization...