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Volume 6, Issue 4 (Suppl)
J Material Sci Eng, an open access journal
ISSN: 2169-0022
Materials Congress 2017
June 12-14, 2017
June 12-14, 2017 Rome, Italy
Materials Science and Engineering
9
th
World Congress on
Preparation and properties of protective coating on inner surface of nickel-based alloy tube
Yanhong Liu
1
and
Yingce Zhang
2
1
State Power Investment Corporation Science and Technology Research Institute, China
2
University of Science and Technology, China
T
horium molten salt reactor (TMSR) is one of key reactors of the generation IV in nuclear power system, and molten salt is
used as fuel and coolant in TMSR, therefore it has been put forward a higher requirement for the anti-corrosion ability of
tubular structural components in molten salt. In this study, the pulse electroplating was used to obtain pure nickel coating on the
inner surface of tubular structural material to improve the corrosion resistance of nickel alloy, however, electroplating on the inner
surface of tube is not easy to implement, for example the current is shielded and the anode is deactivated easily, in order to solve
these problems we used the inner anode and controlled the deposition time at the same time. Pure nickel coating was successfully
obtained and the microstructure and properties of coating were analyzed simultaneously. The thickness, hardness and microstructure
of coating were observed by metallographic microscope, macro-hardness tester and field emission scanning electron microscope,
and the influence of different deposition durations and annealing treatment durations on properties were analyzed, in the meantime,
the thermal shock test was investigated that aim to analyze the adhesion of coating. The results showed that the coating thickness
increased linearly with the extension of electroplating duration, and the size of grain gradually grew. The surface of coating became
rough as well. The hardness of coating increased at first but decreased finally with the increased of duration. However, the change of
hardness was not obvious after annealing. The thermal shock test showed that the coating had good thermal shock resistance and
good bonding strength.
Biography
Yanhong Liu has her expertise in surface technology and materials about coating. Her research is based on surface and coating technology for improving the
overall performance of materials. She used electrochemistry method to get surface protective coating on energy materials. She was doing research on the surface
technology used in the field of nuclear power and new energy field as well. She and her team aims to improve the properties of anti-oxidation and anticorrosion of
zirconium alloy cladding using surface technology.
liuyanhong@spic.com.cnYanhong Liu et al., J Material Sci Eng 2017, 6:4(Suppl)
DOI: 10.4172/2169-0022-C1-068