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All Journal Rekayasa Mesin Sinergi International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Mechanical Engineering for Society and Industry
Darmadi, Djarot Bangun
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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The effect of different levels of cleanness of the pre-coat surface on adhesion and corrosion performance of A36 steel with epoxy coating Widodo, Teguh Dwi; Setyarini, Putu Hadi; Sugiarto, Sugiarto; Raharjo, Rudianto; Bintarto, Redi; Darmadi, Djarot Bangun; Sagita, Sagita
SINERGI Vol 30, No 1 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2026.1.010

Abstract

Adhesion and corrosion protection are the main properties of epoxy coatings, especially when applied to materials exposed to harsh environments, such as chloride-containing water. However, the adhesion and corrosion protection of coatings are affected by surface preparation, especially the cleanliness of the substrate surface prior to coating application. Choosing the proper surface preparation can optimize the coating's capabilities. This research aims to evaluate the Effect of blasting process cleanliness on coating performance on the steel surface. The novel approach is to correlate NACE surface cleanliness standards with coating performance. In this study, A36 steel is used. The cleaning procedure uses an air-blasting process with an 8-bar nozzle pressure and at least 5 minutes of spraying time to meet the desired National Association of Corrosion Engineers (NACE) standard. The abrasive utilizing garnet with a mesh of 30-40. Meanwhile, coating is performed at room temperature using the airless spray method with a 90° angle, a distance of 25 cm from the substrate and the nozzle, and a nozzle speed of 300 mm/s. The gap in the coating process between the first and second layers is 24 hours. The results showed that surface preparation influenced the coating's pullout strength and corrosion performance. The pullout strength test demonstrated that NACE 2 provided the highest pullout strength. Likewise, corrosion rate testing showed that surface preparation affects the corrosion rate, with NACE 1 providing the lowest corrosion rate (the best corrosion protection). 
Co-Authors Abdulla, Farg Abdulla M Ari Setiawan Arif Wahyudiono Azahra, Siti Amalina Diah Ayu Fitriani, Diah Ayu Femiana Gapsari MF Fikrul Akbar Alamsyah Heni Pujiastuti Kamil, Muhammad Prisla Kozin, Muhammad Margono Margono Mega Nur Sasongko Oyong Novareza Prabowo Puranto Pratama, Rizki R Purnomo Budi Santoso Putu Hadi Setyarini Redi Bintarto, Redi Rudianto Raharjo Rusdin Rusdin Sagita, Sagita Setiawan, Yustiza Rahadian Sugiarto S Suwarso, Wahyu Handoyo Teguh Dwi Widodo WIWIEN ANDRIYANTI Yahya, Indra Nur Yudy Surya Irawan