The Effects Of Applied Potential And Coating Thickness On Cathodic Disbondment Of Polyurea Coating

Cathodic disbondment of buried pipelines is a serious threat to the integrity of the corrosion protection system of the pipelines. This project investigates the effects of applied potential and coating thickness to cathodic disbondment of polyurea coating. The objectives of this project are to determine suitable applied potential of cathodic protection and dry film thickness that will not cause cathodic disbondment. The investigation involved two cathodic protection experiments. For the first experiment, four samples with 1.5 mm coating thickness were used and each of them were exposed to different applied potential which varied from -600 mV to -1500 mV. For the second experiment, four samples having 1.0 mm, 1.5 mm, 2.0 mm and 2.5 mm coating thickness were used and the same applied potential of -850 mV were used. Result from the experiments show that at coating thickness of 1.5mm, -850 mV is the best applied potential for cathodic protection that can avoid cathodic disbondment. When -1500 mV applied potential is used, it causes a lot of cathodic disbondment effects. Then, at -850 mV applied potential, 1.5 mm is the optimum coating thickness that can reduce cathodic disbondment effects. When the coating thickness increases more than 1.5 mm, cathodic disbondment effects are also increase. Besides that, absorption of water also increases as the coating thickness increases. In conclusion, an applied potential of -850 mV and a coating thickness of 1.5 mm was found able to reduce cathodic disbondment effects

Abstracts of the International Halal Science Conference 2023

This book presents the extended abstracts of the selected contributions to the International Halal Science Conference, held on 22-23 August 2023 by the International Institute for Halal Research and Training (INHART), IIUM, Malaysia in collaboration with Halalan Thayyiban Research Centre, University Islam Sultan Sharif (UNISSA), Brunei Darussalam. With the increasing global interest in halal products and services, this conference is timely. Conference Title:  International Halal Science ConferenceConference Acronym: IHASC23Conference Theme: Halal Industry Sustainability Through ScienceConference Date: 22-23 August 2023Conference Venue: International Islamic University (IIUM), MalaysiaConference Organizer: International Institute for Halal Research and Training (INHART), International Islamic University (IIUM), Malaysi