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New Corrosion Inhibitors Based on Perylene Units in Epoxy Ester Resin Coatings
| Content Provider | MDPI |
|---|---|
| Author | Marek, Bouška Anna, Krejčová Andr, éa Kalendová Kohl, Miroslav Alafid, Fouzy Raycha, Yash Hrdina, Radim Burgert, Ladislav |
| Copyright Year | 2022 |
| Description | Four new compounds from perylene dianhydride were prepared and tested for their anti-corrosion properties. Dizinc salt of perylene-3,4,9,10-tetracarboxylic acid and dimagnesium salts of perylene-3,4,9,10-tetracarboxylic acid, 5,5′-(1,3,8,10-tetraoxo-1,3,8,10-tetrahydroanthra[2,1,9-def:6,5,10-d′e′f′] diisoquinoline-2,9-diyl) bis(2-hydroxybenzoic acid) and N,N′-bis[3,3′-(dimethylamino)propylamine]-3,4,9,10-perylenediimide were characterized by analytical methods (SEM, EDX, X-ray) and parameters used in the field of paints (density, oil number and critical volume concentrations of pigment). The pigments (in a pigment volume concentration series) were used to prepare paints also containing a perylene $C_{26}H_{14}N_{2}O_{4}$ (Compound I) derivative pigment plus inert titanium dioxide to maintain a constant concentration of solids in the paint film. A mixture containing zinc nitroisophthalate and both the perylene derivative and titanium dioxide served as the reference material. The paints were applied to steel panels in two layers with a ruler. The organic coatings were subjected to electrochemical measurements and accelerated cyclic corrosion tests. The highest corrosion resistance was found for the coating containing $C_{24}H_{8}O_{8}Mg_{2}$. Superior to the coating containing either $C_{26}H_{14}N_{2}O_{4}$ or the conventional corrosion inhibitor $C_{8}H_{5}N0_{6}$-Zn, this pigment type acted mainly by a mechanism based on the compound’s complexation capacity at the metallic surface/organic coating/corrosion medium interface. The organic coatings containing perylene acid salts also attained high mechanical resistance. |
| Starting Page | 923 |
| e-ISSN | 20796412 |
| DOI | 10.3390/coatings12070923 |
| Journal | Coatings |
| Issue Number | 7 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-06-29 |
| Access Restriction | Open |
| Subject Keyword | Coatings Coatings and Films Perylene-3,4,9,10-tetracarboxylic Acid Salts Pigment Coating Corrosion Anticorrosion Efficiency |
| Content Type | Text |
| Resource Type | Article |
