Status : Verified
| Personal Name | Dimasin, Gabriel Sebastian C. |
|---|---|
| Resource Title | Self-healing Characteristics of Superabsorbent Polymers in Epoxy Coating for Corrosion Inhibition of Carbon Steels |
| Date Issued | 27 July 2023 |
| Abstract | Mechanical defects, like scratches in corrosion protective coating systems, are unavoidable in practical engineering applications. Coatings with self-healing properties represent a new development against such occurrences. This study developed and evaluated the use of Superabsorbent Polymers (SAP) as a self-healing additive to epoxy paint systems. The SAP underwent preliminary characterization to determine its primary properties and was then incorporated into the epoxy primer at different percentages. The epoxy-SAP composite was subjected to thermal analysis to observe the possible effects and interactions of their mixing and then the coating system underwent corrosion testing via electrochemical impedance spectroscopy, adhesion test, and long-term immersion test to evaluate their self-healing capability. Through characterization tests, the SAP is determined to have an average size of 165 μm by measuring its Feret diameter and FTIR results confirms the polymer structure and functional groups present in the SAP. It is also determined that the SAP has a free swelling capacity of 25.23 g/g and a swelling rate of 0.435 g/gs at 3.5 wt.% NaCl solution. Thermal analysis using Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC) showed that the epoxy curing process does not result to the decomposition of SAP and this is supported by visual inspection of the side profile of the coating under an optical microscope; the curing instead results to the removal of moisturewithin the SAP structure. The adhesion of the epoxy-SAP coating system is tested using ASTM D3359-17 and excellent adhesion was obtained with the coating system composed of initial epoxy primer, epoxy-SAP layer, final epoxy primer, and an epoxy enamel topcoat because no peeling or removal of the coating was observed. Electrochemical Impedance Spectroscopy (EIS) was used to determine the corrosion behavior of the epoxy-SAP system. The addition of SAP increased the charge tran |
| Degree Course | Master of Science in Materials Science and Engineering |
| Language | English |
| Keyword | electrochemical impedance spectroscopy, epoxy polyamide, self-healing coating, superabsorbent polymers |
| Material Type | Thesis/Dissertation |
Preliminary Pages
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Category : I - Has patentable or registrable invention of creation.
Access Permission : Limited Access