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ABSTRAKKorosi memiliki dampak yang sangat besar terhadap ekonomi dan lingkungan
pada berbagai infrastruktur, terkait dengan kegagalan operasi dan aset. Masalah
yang umum terjadi pada jaringan pipa minyak dan gas saat ini adalah korosi
internal yang disebabkan oleh media korosif yang umumnya mengandung karbon
dioksida (CO2) dalam larutan aqueous. Karenanya, diperlukan cara untuk
mengevaluasi korosi CO2 pada baja karbon terkait laju korosi agar dapat
memenuhi umur operasi.
Dalam penelitian ini, model Norsok yang telah dimodifikasi digunakan untuk
memprediksi laju korosi pada lingkungan CO2, dan mempertimbangkan data
parameter seperti suhu, tekanan parsial CO2, dan laju aliran untuk menghitung
shear stress dan laju korosi. Software ini dibuat dengan menggunakan bahasa
pemrograman visual basic (Microsoft Visual Studio ? VB), kemudian dengan
menggabungkan basis pengetahuan mekanisme korosi CO2 dan aturan tertentu
maka akan dihasilkan suatu sistem pakar.
Berdasarkan perhitungan shear stress dan laju koros, kemudian rekomendasi dapat
diajukan untuk mempertimbangkan, apakah baja karbon masih dapat digunakan
atau penggunaan baja karbon dengan memberikan inhibitor atau penggantian baja
karbon dengan Corrosion Resistance Alloys.
Hasil perhitungan modifikasi model Norsok menunjukkan bahwa hasil
perhitungan laju korosi tampak lebih realistis dibandingkan dengan model Norsok
asli, dan dapat digunakan untuk mengevaluasi baja karbon yang mengalami korosi
CO2 dengan tingkat kepercayaan lebih tinggi.
ABSTRACTCorrosion has a great detrimental effect to economy and environment in almost all
infrastructures, in regards of operations shutdown and asset facilities failure. A
common problem in oil and gas process piping and transport pipeline nowadays is
internal corrosion caused by corrosive media containing mainly carbon dioxide
(CO2) in aqueous solutions. Therefore, there is a need to evaluate CO2 corrosion
of carbon steel in terms of corrosion rate in order to meet its life expectancy in
such environment.
In this paper, a modified Norsok model was used to predict corrosion rate in CO2
environment, and consider typical data parameter used such as temperature, CO2
partial pressure, and flow rate or fluid velocity to calculate shear stress and
corrosion rate. By combining knowledge base related to CO2 corrosion
mechanism and its logic algorithm with certain rules resulted in such expert
system which utilize visual basic (Microsoft Visual Studio-VB) programming
language to develope a software.
Based on calculated shear stress and corrosion rate, then recommendations can be
proposed whether carbon steel still can be used or carbon steel with inhibitor
injection or carbon steel replaced by Corrosion Resistance Alloys.
The modified Norsok calculation model results show that the calculated corrosion
rates are likely more realistic compared to the original Norsok model, and can be
used to evaluate carbon steel which suffered CO2 corrosion with highly confident.;Corrosion has a great detrimental effect to economy and environment in almost all
infrastructures, in regards of operations shutdown and asset facilities failure. A
common problem in oil and gas process piping and transport pipeline nowadays is
internal corrosion caused by corrosive media containing mainly carbon dioxide
(CO2) in aqueous solutions. Therefore, there is a need to evaluate CO2 corrosion
of carbon steel in terms of corrosion rate in order to meet its life expectancy in
such environment.
In this paper, a modified Norsok model was used to predict corrosion rate in CO2
environment, and consider typical data parameter used such as temperature, CO2
partial pressure, and flow rate or fluid velocity to calculate shear stress and
corrosion rate. By combining knowledge base related to CO2 corrosion
mechanism and its logic algorithm with certain rules resulted in such expert
system which utilize visual basic (Microsoft Visual Studio-VB) programming
language to develope a software.
Based on calculated shear stress and corrosion rate, then recommendations can be
proposed whether carbon steel still can be used or carbon steel with inhibitor
injection or carbon steel replaced by Corrosion Resistance Alloys.
The modified Norsok calculation model results show that the calculated corrosion
rates are likely more realistic compared to the original Norsok model, and can be
used to evaluate carbon steel which suffered CO2 corrosion with highly confident., Corrosion has a great detrimental effect to economy and environment in almost all
infrastructures, in regards of operations shutdown and asset facilities failure. A
common problem in oil and gas process piping and transport pipeline nowadays is
internal corrosion caused by corrosive media containing mainly carbon dioxide
(CO2) in aqueous solutions. Therefore, there is a need to evaluate CO2 corrosion
of carbon steel in terms of corrosion rate in order to meet its life expectancy in
such environment.
In this paper, a modified Norsok model was used to predict corrosion rate in CO2
environment, and consider typical data parameter used such as temperature, CO2
partial pressure, and flow rate or fluid velocity to calculate shear stress and
corrosion rate. By combining knowledge base related to CO2 corrosion
mechanism and its logic algorithm with certain rules resulted in such expert
system which utilize visual basic (Microsoft Visual Studio-VB) programming
language to develope a software.
Based on calculated shear stress and corrosion rate, then recommendations can be
proposed whether carbon steel still can be used or carbon steel with inhibitor
injection or carbon steel replaced by Corrosion Resistance Alloys.
The modified Norsok calculation model results show that the calculated corrosion
rates are likely more realistic compared to the original Norsok model, and can be
used to evaluate carbon steel which suffered CO2 corrosion with highly confident.]
T43089-Yepi Yamani Yosa.pdf :: Unduh