Effect of 2-Methylimidazole Composition as Low-Temperature Application in Phenol-Formaldehyde, Glycidyl Ether Epoxy Coating

Rinush Fedrikdo Paltgor; Rini Riastuti; Rizal Tresna Ramdhani; Muhammad Yunus

doi:10.55981/jsmi.2023.267

Authors

Rinush Fedrikdo Paltgor Universitas Indonesia
Rini Riastuti Universitas Indonesia
Rizal Tresna Ramdhani Universitas Indonesia
Muhammad Yunus Research Center for Polymer Technology, National Research and Innovation Agency

DOI:

https://doi.org/10.55981/jsmi.2023.267

Keywords:

2-Methylimidazole, Coating performance, Low temperature, Pile pipe

Abstract

The addition of materials to pile pipe at low temperatures is very challenging. Thereby, an optimum operating level is needed to produce a quality coating. Furthermore, 2-methylimidazole (2MI) was added into a phenol-formaldehyde, glycidyl ether polymer fusion bonded epoxy (FBE) coating at different concentrations of 1, 2, and 3 %wt. Thermal analysis was then carried out using differential scanning calorimetry (DSC), where the addition of 2MI decreased the curing temperature to 134.76°C due to the reduced activation energy. Potentiodynamic polarization showed the best corrosion rate of 0.00991 mm/year with a current density of 0.847μA/cm2 after adding 1 %wt 2MI. Electrochemical impedance spectroscopy (EIS) was carried out to determine the charge transfer resistance and maximum coating capacitor capacitance after adding 1 %wt 2MI, namely 9.9 kΩ and 8.45×10-5 F, respectively. The cathodic disbondment test (CD-Test) showed that the disbondment radius of the coating under the influence of the cathodic protection current was 4.32mm. Mechanical analysis by pull-off adhesion test showed a value of 7.28 MPa after the addition of 2MI 2 %wt but decreased to 6.63 MPa at 3 %wt. Therefore, the optimum addition is 1 %wt 2MI for low-temperature applications of 170 –175°C in piles with high coating performance and compliance with predetermined standards.

Author Biographies

Rini Riastuti, Universitas Indonesia

Rini Riastuti is a Doctor of Engineering, she received her doctorate from Unversitas Indonesia in Metallurgy and Materials, the master's degree from University of Manchester Institute of Science and Technology (UMIST), and her bachelor's degree from Universitas Indonesia in Metallurgy. She is interested in Corrosion, Metal Protection, and Material Engineering. Currently, she is Head of the Corrosion and Extraction Laboratory of Universitas Indonesia’s Department of Metallurgy and Materials.

Rizal Tresna Ramdhani, Universitas Indonesia

Rizal Tresna Ramdhani is a Chairman of NACE Indonesia Section, he received his master's degree from Universitas Indonesia in Corrosion, and his bachelor's degrees from Airlangga University and Sepuluh Nopember Institute of Technology in Chemical Engineering. He is a NACE Certified Coating Inspector Level 3 - Peer Review CIP No. 40242 and NACE Instructor - Coating Inspector Program. Now he is active as a Country Marine PC Technical Service Manager for PT International Paint Indonesia.

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