Pengaruh Perbedaan Metode Surface Preparation Terhadap Daya Rekat Painting Pada Pipa Astm A106 Grade B

Abstract

An oil and gas company in Tuban, East Java, is planning maintenance of its hydrant piping system made of ASTM A106 Grade B material. As these pipes will serve as part of the fire extinguishing system, proper surface cleaning is required before coating application. This study evaluates the effect of different surface preparation methods on paint adhesion. The methods compared include sandblasting and power tools, with variations in pressure, duration, and abrasive material. Silica sand and volcanic sand were applied for sandblasting, while wire and twist wire brushes were used for power tools. Surface roughness was measured according to ISO 8503-1, and adhesion was tested using the X-Cut Tape Test in line with ASTM D3359 A. Results show that sandblasting provided higher surface roughness and stronger paint adhesion compared to power tools. Increasing process variables improved performance in both methods. Overall, the study concludes that surface roughness strongly influences adhesion, which directly affects corrosion resistance and extends the service life of hydrant pipes. These findings provide recommendations for selecting effective preparation methods in industrial piping maintenance.