Perbandingan laju korosi berdasarkan perhitungan corrosion probe terhadap corrosion coupon, software corrosion modelling pada sistem pipa penyalur gas bumi dengan adanya gas CO2 dan H2S = Comparation of corrosion rate based on calculation corrosion probe corrosion coupon, and corrosion modelling in gas pipeline due to CO2 and H2S present