Enhancement of corrosion protection ability of epoxy by inclusion of metakaolin clay

Abstract

Resin Are Widely Selected As Corrosion Protective Coating, However, The Formation Of Pore Network Limits Its Application. The Aim Of This Thesis Was Enhancing The Performance, Thermal Stability, Water Absorptions And Sulfuric Acid Resistivity, Of Kadilux Epoxy Resin By Inclusion Of Metakaolin Fillers. The First Step Of This Thesis Focused On The Study Of Kaolin And Metakaolin Clay Property By Using Water Absorption Test. This Part Also Includes Surface Modification Of Filler By Using Triethanolamine. Results Showed That The Metakaolin Clay Had Low Water Absorption Property And In Case Of Surface Modification Triethanolamine Modifier DiEpoxydnot Show Any Significance Change On Interplanar Spacing. As A Second Step, Samples Was Prepared By Using 0,1,3,5, And 7wt% Metakaolin And Kadilux Resin By Direct Mixing Methods. The Investigation Was Carried Out By Using Optical Microscopy, Xrd Analysis, Thermogravimetric Analysis, Water Absorption And Acid Immersion Test. Acid Immersion And Water Absorption Was Done According To Astm G31 And Astm D-570 Standards Respectively. The Performance Of The Composite In Acidic Solution Was Evaluated By Measuring The Weight Loss, Thickness Reduction And Visual Inspection Of Coated Sample After Immersed In Acidic Solution. According To Optical Microscope Study There Was The Formation Of Pore Network In Cured Epoxy. In Case Of Acid Immersion Test Analysis The Weight Loss, Visual Assessment And Thickness Reduction Reveal That The Inclusion Of Metakaolin In Epoxy Matrix Had A Positive Effect On Protection Of Substrate From Sulfuric Acid And Further Increment Of Metakaolin Concentration And Coating Thickness Gave Better Performance For Polymer Coating. Regarding To Water Absorption Test The % Weight Gain Of Immersed Sample Were Indirectly Measured And Composite Samples Showed Low Water Absorption. According To The Results Epoxy Composite Shows Better Barrier And Acid Resistance Properties Among All Samples Epoxy With 7 Wt% Of Metakaolin Composite Shows Better Barrier And Acid Resistance Properties. The Presence Of Metakaolin Filler Totally Reduce The Transparency Of Matrix. Thermal Stability Of Composite Also Improved And 5wt% Composite Show Better Thermal Performance.