PENGARUH RAPAT ARUS DAN PROSES NICKEL STRIKE TERHADAP KUALITAS LAPISAN TEMBAGA PADA SUBSTRAT AISI 430 UNTUK APLIKASI INTERCONNECT SOFC
Solid oxide fuel cell is one of the components which utilize the energy from chemical reaction into electricity. The problems found on metal interconnect are such as chromia gas evaporation which can reduce the performance of the cathode, and concentrated current electricity at the contact area o...
Saved in:
| Main Author: | |
|---|---|
| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/40886 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Solid oxide fuel cell is one of the components which utilize the energy
from chemical reaction into electricity. The problems found on metal interconnect
are such as chromia gas evaporation which can reduce the performance of the
cathode, and concentrated current electricity at the contact area of anode and
interconnect which leads to rapid growth of chromia scale. Therefore, one of the
solutions is to perform a coating on ferritic stainless steel substrate so the
interaction with environment can be limited, and oxides formed are expected to
have good electrical conductivity and protective characteristics towards chromium
scale volatility.
In this experiment, electroplating method was used in copper coating on
ferritic stainless steel. The variable parameters are current density and use of
nickel strike treatment. The current density used was 10, 15, and 20 mA/cm2.
Furthermore, the effect of nickel strike treatment to copper coating quality was
investigated. Sample of electroplating then were oxidized at 800 oC for 4 days to
observe the oxide formed. The result of electroplating and oxidation were
characterized with optical microscope, SEM, and X-ray Diffraction to study the
morphologies of the surface, actual thickness and identification of the oxide
formed on substrate.
From the characterization analysis, it was concluded that higher current
density will result bigger grain size of electrodeposited copper. When current
density used was less than limiting current of polarization result, the hydrogen
evolution would not happen and the current efficiency was 94.5–98%. Nickel
strike treatment affected the copper coat by resulting smoother surface and smaller
grains of electrodeposited copper. XRD result showed CuO (tenorite, syn) was
formed. Nickel strike effect on oxidized coating was less amount of pores and
smaller size. |
|---|