STUDY OF ELECTROCHEMICAL PROPERTIES AND CHARACTERIZATION OF SUBSTRAT UNS C70600 COATED WITH MnO2 FOR IMPRESSED CURRENT CATHODIC PROTECTION ANODE
Anode have become one of important aspects in Impressed Current Cathodic Protection (ICCP). ICCP anode should give adequate current density for protection to protected structure. This study will focus on forming an electrocatalyst oxide layer MnO2 on the surface of CuNi alloy. Anode is expected t...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/40815 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Anode have become one of important aspects in Impressed Current Cathodic Protection
(ICCP). ICCP anode should give adequate current density for protection to protected
structure. This study will focus on forming an electrocatalyst oxide layer MnO2 on the
surface of CuNi alloy. Anode is expected to produce a large current density for
protection and a low rate of degradation as the ICCP anode condition.
The main research is to form MnO2 layer by heating process after electroplating Mn.
The study used several methods of characterization.OES method to determine the
element composition of copper nickel alloy, SEM method to determine the surface’s
morphology of MnO2 oxide layer result from electroplating and heating process. XRD
method to check whether MnO2 oxide form at CuNi alloy’s surface by heating process.
Electrochemical properties are obtained by polarization potensiodynamic before and
after electroplating process on H2SO4, NaCl and sea water environtment.
From metallography and OES method, turn out that CuNi alloy spesimen is UNS
C70600 alloy. From polarization test before electroplating result that UNS C70600
alloy have a corrosion resistance and corrosion current drain ability near to Titanium.
Electroplating method showed the best current density to use for Mn coating is below 5
A/dm2. Heating process is carried out to form MnO2. XRD method showed that MnO2
formed at heating temperatur 400°C for about 22 minutes.
Polarization test after electroplating and heating process showed that CuNi alloy-MnO2
has better corrosion resistance compared to MMO anodes. In kinetics of corrosion,
CuNi alloy-MnO2 showed electrochemical activity at low potential around 0-0,3 V.
This means that MnO2 anode can be used as ICCP anode at low potential range. |
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