Important: AMPP System Update February 27 - March 11 – Limited Access to AMPP Digital Services. Act Now to Avoid Disruptions! - Learn More
New corrosion protective coatings were proposed and long term corrosion tests were performed. These coatings, based on modified polyaniline, showed that hexacyanoferrate improved their anticorrosion properties.
New corrosion protective coatings were proposed and long term corrosion tests were performed. These coatings, based on modified polyaniline, showed that hexacyanoferrate improved their anticorrosion properties. Our recent research gives some information about the increasing oxygen diffusivity barrier when nano-TiO2 is added. The goal of this paper was to check if there is a synergy effect between these two compounds. The polyaniline-hexacyanoferrate-nano-TiO2 composites were prepared by in situ oxidative polymerization of aniline in solutions of two different inorganic acids. The corrosion tests were carried out on carbon steel substrates coated by alkyd coatings (using frame film applicator, one-coat application) containing the anticorrosion pigments 0.5 mass% of these composites in comparison to coating modified with the same amount of polyaniline hexacyanoferrate. The salt spray and EIS (Electrochemical Impedance Spectroscopy) investigations were carried out according to the PN-EN ISO 9227:2017 and PN-EN ISO 16773-2:2016 standards. The EIS test was performed for six weeks, with weekly impedance measurements. The results showed highest anticorrosion resistance of coatings modified with PANI-hexacyanoferrate-nano-TiO2 composites, especially the composite obtained in solution of sulfuric acid. Key words: corrosion, steel, exposure tests, conductive polymers, titanium dioxide
Destructive physical inspection for corrosion under protective coatings post-exposure suggests that significant metal loss may be occurring in the absence of a visual indication and that actual corrosion/material loss does not correlate with the visual inspection data.
We are unable to complete this action. Please try again at a later time.
If this error continues to occur, please contact AMPP Customer Support for assistance.
Error Message:
Please login to use Standards Credits*
* AMPP Members receive Standards Credits in order to redeem eligible Standards and Reports in the Store
You are not a Member.
AMPP Members enjoy many benefits, including Standards Credits which can be used to redeem eligible Standards and Reports in the Store.
You can visit the Membership Page to learn about the benefits of membership.
You have previously purchased this item.
Go to Downloadable Products in your AMPP Store profile to find this item.
You do not have sufficient Standards Credits to claim this item.
Click on 'ADD TO CART' to purchase this item.
Your Standards Credit(s)
1
Remaining Credits
0
Please review your transaction.
Click on 'REDEEM' to use your Standards Credits to claim this item.
You have successfully redeemed:
Go to Downloadable Products in your AMPP Store Profile to find and download this item.
This paper will critically review the current philosophies described in ISO and NACE anti-corrosive performance test standards, taking into consideration correlation with natural exposure, track record, validity of "acceptance" or "pre-qualification criteria", dry film thickness and suggested areas for improvement.