Analisa Laju Korosi dan Lifetime Terhadap Pemilihan Jenis Coating Pada Pipa Penyalur Gas di Aerial Area Perusahaan Minyak dan Gas Bumi di Kalimantan

  • Ahmad Miftahul Khoiri
  • Budi Prasojo, S.T., M.T
  • Pranowo Sidi, S.T., M.T
Keywords: External corrosion, aerial area, coating

Abstract

Corrosion that occurs on the outer wall of the pipe (external corrosion) is mainly caused
by environmental factors that have a high corrosive level. Underground pipes, subsea pipes and pipes
that are very close to sea level (aerial area) have a tendency to corrode. With the addition of a
coating on the outside of the pipe wall can prevent corrosion by the environment. In this study, API
5L X65 pipe material was used by varying the type of coating which was then carried out an
immersion test based on ASTM G31. Specimens were tested with variations in temperature 25◦C,
35◦C, 45◦C and salinity variations of 33 ppt, 38 ppt, 42 ppt. Based on the corrosion rate value, the
specimen with epoxy polyamide coating type at 25◦C and 33 ppt salinity had the lowest corrosion rate
value. While the highest corrosion rate occurs in the type of polyurethane coating at a temperature of
45◦C and a salinity of 42 ppt. Furthermore, the remaining life calculation is based on API 570 and
the minimum thickness calculation is based on ASME B31.8 as a reference code for the pipeline.
Statistical analysis using SPSS software shows that the type of epoxy polyamide coating has the
highest protection effectiveness when compared to other types of coatings. The highest lifetime value
occurs in the epoxy polyamide coating at a temperature of 25◦C with a salinity of 33 ppt, which is
61.2 years.

Published
2022-02-13