Ardian, Fahny (2018) Analisa Pengaruh Variasi Temperatur Fluida Dalam Dan Variasi Jenis Lingkungan Luar Terhadap Karakteristik Korosi Di bawah Insulasi Baja ASTM A53 Grade-B. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Corrosion Under Insulation (CUI)adalah penurunan
kualitas material yang terjadi di antara material logam dengan material insulasi. Salah satu cara untuk mencegah terjadinya CUI dengan inorganic zinc coating. Namun
inorganic zinc pada temperatur 60oC akan mengalami korosi galvanik. Penelitian ini bertujuan untuk mengetahui pengaruh variasi temperatur fluida dalam pi
pa dan jenis lingkungan luar terhadap karakteristik CUI
pada baja ASTM A53 Grade-B berbahan insulasi silica aerogel dan alumunium foil serta menggunakan coating PTFE.
Spesimen akan diuji pada temperature fluida dalam sebesar
50oC, 60oC dan 70oC. Dengan jenis lingkungan luar berupa variasi kandungan klorin (Cl-). Spesimen diuji selama 14 hari dengan metode immerse. Dari uji mikroskop optik diketahui bahwa seiring dengan kenaikan temperatur fluida dalam akan meningkatkan kerusakan pada coating PTFE.
Pengujian SEM menunjukkan bahwa jenis korosi yang terjadi adalah jenis uniform corrosion. Hasil
pengujian XRD menunjkkan adanya senyawa 퐹푒퐶푙2
,
퐹푒
푆푂
4
dan
퐹푒
(
푂퐻
)
2
.
Dari hasil weight loss
didapatkan bahwa laju korosi
tertinggi adalah spesimen pada
temperatur 70
o
C dan pada
lingkungan 450 ppm NaCl sedangkan untuk laju korosi terendah
adalah spesimen pada temperatur 50
o
C dan pada lingkungan 0
ppm NaC
l
=======================================
Corrosion Under Insulation (CUI) is a degradation in the
quality of material occurring between the metal mate
rial
and
insulating material. One way to prevent CUI
using
inorganic zinc
coatings. However, inorganic zinc at temperature of 60°C wil
l
transform to
galvanic corrosion. Th
e purpose of this final project
is
to determine the effect of
internal fluid
temperature and
variety
of external
environment to
characteristics of CUI
on carbon steel
ASTM A53 Grade
-
B insulat
ed by
silica
ae
r
o
gel and aluminum foil
and using a PTFE coating. The specimens w
ere
tested at
internal
fluid
temperature of 50°C,
60
o
C and 70
o
C. With
the external
environment using
variations of chlorine (Cl
-
). Specimens were
tested for 14 days
using i
mmerse
methode
.
From the test result
using
optical microscope is known that along with the increas
ing
of
internal
fluid temperature
,
increase the
damage
of
PTFE
coating. SEM testing show
ed
that this type of corrosion that occurs
is uniform corrosion. The test results of XRD
showed
the compound
it was
퐹푒퐶
푙
2
,
퐹푒
푆푂
4
a
nd
퐹푒
(
푂퐻
)
2
. From the results of weight
loss
,
found that the highest corrosion rate is the specimen at 70
o
C
and at 450 ppm NaCl
.
T
he corrosion rate is the lowest for the
specimen at temperature of 50°C and environment of 0 ppm NaC
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | CUI, Coating PTFE, Klorin, Temperatur, Chlorine, Temperature, Corrosion |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Ardian Fahny |
| Date Deposited: | 09 Oct 2018 05:26 |
| Last Modified: | 12 Mar 2021 04:47 |
| URI: | http://repository.its.ac.id/id/eprint/52710 |
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