scholarly journals Influence of Elements on the Corrosion Resistance of DLC Films

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Nutthanun Moolsradoo ◽  
Shuichi Watanabe
Keyword(s):  
Corrosion Resistance ◽  
Silicon Content ◽  
Corrosion Potential ◽  
Film Structure ◽  
Dlc Film ◽  
Hardness Tester ◽  
Potential Value ◽  
Corrosion Resistance Property ◽  
Nanoindentation Hardness ◽  
Silicon Silicon

Pure DLC, Si-DLC, and Si-N-DLC films deposited from C2H2, C2H2 : TMS and C2H2 : TMS : N2 mixtures were used to study the effects of the elemental contents (silicon, silicon-nitrogen) on deposition and corrosion resistance properties. The films were prepared on Si (100) wafers using the plasma-based ion implantation (PBII) technique. The film structure was analyzed using Raman spectroscopy. The composition at the top surface of the films was measured using energy dispersive X-ray spectroscopy (EDS). The hardness and elastic modulus of the films were measured using a nanoindentation hardness tester. The corrosion performance of the films was conducted using potentiodynamic polarization experiments in an aqueous 0.05 M NaCl solution. The results indicate that the hardness and corrosion resistance of the Si-DLC film increase as the silicon content increases. This is due to the increase of the sp3 cluster. The corrosion resistance of a pure DLC film increases when silicon and silicon-nitrogen are doped into the film. Si-DLC films with a silicon content of 40 at.% had a corrosion potential value of 0.61 V, while a Si-N-DLC film with a silicon and nitrogen content of 19.3 at.% and 1 at.% shows a corrosion potential value of 0.85 V, which is a considerable improvement in the corrosion resistance property.

Improvement of MIC Behavior of Ship Plate Steel with LaCl3-Zn Epoxy Coating

2011 ◽  
Vol 488-489 ◽  
pp. 254-257
Author(s):  
Qing Fen Li ◽  
Jun Wang ◽  
Yu Dong Fu ◽  
Chun Hui Li
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Potential ◽  
Steel Specimen ◽  
Epoxy Coating ◽  
Plate Steel ◽  
Sulfate Reducing ◽  
Corrosion Resistance Property ◽  
Reducing Bacteria ◽  
Better Than ◽  
Good Agreement

The MIC behavior of the ship plate steel specimen with LaCl3-Zn epoxy coating in the sulfate-reducing bacteria (SRB) solution was investigated in this paper. The variation of corrosion potential over time of different specimens in SRB solution show that the corrosion potential of the specimen with LaCl3-Zn epoxy coating was obviously higher than the Zn-epoxy coating, suggesting that the LaCl3-Zn epoxy coating may offer better protection. The variations of lgflg |Z|=4.5 and fhwith time show that the property of anti-infiltration and corrosion resistance of LaCl3-Zn coating is much better than the ones of Zn-epoxy coating. Results also show that more sulfides and corrosion products of LaCl3-Zn epoxy coating were produced which increased the shielding property of the coating. The experimental results of XRD and SEM are in good agreement with the ones of Ecorr,and EIS, etc. They all show that the LaCl3-Zn epoxy coating exhibits more favorable corrosion resistance property than the Zn-epoxy coating. It is obvious that coating the ship plate steel with LaCl3-Zn epoxy is an effective and promising method against the attack of SRB in marine environment.

812 Influence of DLC film structure on corrosion resistance

2013 ◽  
Vol 2013.21 (0) ◽  
pp. _812-1_-_812-3_
Author(s):  
Atsuyuki TAKARADA ◽  
Naoto OHTAKE ◽  
Hiroki AKASAKA
Keyword(s):  
Corrosion Resistance ◽  
Film Structure ◽  
Dlc Film

The Effect of Different CeO2 Addition on Performance of Ni-WC Composite Coating by Vacuum Fusion Sintering

2013 ◽  
Vol 750-752 ◽  
pp. 2052-2056 ◽  
Author(s):  
Lu Miao ◽  
Ya Nan Wang ◽  
Yan Hui Li
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Composite Coatings ◽  
Salt Spray ◽  
Testing Machine ◽  
Wear Testing ◽  
Hardness Tester ◽  
Resistance Property ◽  
Corrosion Resistance Property ◽  
Better Than

By vacuum fusion sintering technique made different CeO2 addition Ni-WC composite coatings on 45 steel. Hardness, wear resistance property and corrosion resistance property of the Rare-earth Ni-WC composite coatings were measured and analyzed by Rockwell hardness tester,micro-hardness tester, friction wear testing machine and Salt spray corrosion box. The results showed that:The CeO2 content comes up to 0.75% of the coatings` hardness, wear resistance and corrosion resistance property better than those of other coatings.

Structure and Electrochemical Properties of DLC/SiC Films on the Surface of Magnesium Alloy by Plasma Immersion Ion Deposition

2013 ◽  
Vol 750 ◽  
pp. 298-301
Author(s):  
Yuan Yuan Guo ◽  
Hong Yang Zhao ◽  
Dong Ying Ju ◽  
Alan Hase ◽  
Rong Hua Wei
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Transition Layer ◽  
Corrosion Potential ◽  
Surface Hardness ◽  
Dlc Film ◽  
Electrochemical Tests ◽  
Magnesium Alloy Az31 ◽  
Sic Films ◽  
Ion Deposition

DLC/SiC films (SiC as a transition layer) were prepared on the surface of magnesium alloy (AZ31) using a plasma immersion ion deposition (PIID) process. A dense and smooth DLC film can be observed by SEM. The surface hardness can be improved to 11.45GPa by deposition of the DLC film. Electrochemical tests show that the corrosion potential of AZ31 with DLC film is increased from -1.7V to -0.6V, which indicates that the DLC film improves the corrosion resistance of Mg alloy.

CANNON-MUSKEGON 8620

Alloy Digest ◽  
1973 ◽  
Vol 22 (12) ◽  
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Alloy Steel ◽  
Investment Casting ◽  
Silicon Content ◽  
Heat Treating ◽  
Low Carbon ◽  
Heat Treated ◽  
Casting Industry ◽  
Small Parts

Abstract CANNON-MUSKEGON 8620 is a low-carbon triple-alloy steel capable of being carburized for wear resistance or heat treated for toughness. This steel is suitable for many engineering applications, and is used in large quantities in the investment casting industry for small parts. A higher silicon content is permissible in this steel than in AISI 8620 (wrought) alloy steel. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: SA-299. Producer or source: Cannon-Muskegon Corporation.

scholarly journals Influence of Shielding Gas on Microstructure and Properties of GMAW DSS2205 Welded Joints

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2671
Author(s):  
Xin-Yu Zhang ◽  
Xiao-Qin Zha ◽  
Ling-Qing Gao ◽  
Peng-Hui Hei ◽  
Yong-Feng Ren
Keyword(s):  
Corrosion Resistance ◽  
Welded Joints ◽  
Welded Joint ◽  
Crystal Defects ◽  
Shielding Gas ◽  
Electrochemical Tests ◽  
Corrosion Resistance Property ◽  
Mechanical Properties And Corrosion ◽  
Ar Gas ◽  
Welded Seam

In the present study, the microstructures and properties of DSS 2205 solid wire MIG welded samples prepared in different shielding gases (pure Ar gas, 98%Ar + 2%O2 and 98%Ar + 2%N2) were investigated for improving the weldability of DSS 2205 welded joint. The work was conducted by mechanical property tests (hardness and tensile test) and corrosion resistance property tests (immersion and electrochemical tests). The results show that adding 2%O2 into pure Ar gas as the shielding gas decreases crystal defects (faults) and improves the mechanical properties and corrosion resistance of the welded joints. Phase equilibrium and microstructural homogeneity in welded seam (WS) and heat-affected zone (HAZ) can be adjusted and the strength and corrosion resistance of welded joints increased obviously by adding 2%N2 to pure Ar gas as the shielding gas. Compared with DSS 2205 solid wire MIG welding in 98%Ar + 2%O2 mixed atmosphere, the strength and corrosion resistance of welded joints are improved more obviously in 98%Ar + 2%N2 mixed atmosphere.

Electrochemical Impedance Spectroscopy (EIS) Study of Nano-Composite Polyurea Coating under the Wet-Dry Cyclic Conditions

2014 ◽  
Vol 789 ◽  
pp. 495-500
Author(s):  
Bing Ying Wang ◽  
Qing Hao Shi ◽  
Wen Long Zhang
Keyword(s):  
Corrosion Resistance ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Composite Coating ◽  
Electrochemical Impedance ◽  
Protective Action ◽  
Experimental Result ◽  
Resistance Property ◽  
Corrosion Resistance Property ◽  
Mass Fractions

The polyurea was modified by adding different amounts of nanometer ZnO. The corrosion behavior of polyurea/primer composite coating system in wet-dry cyclic environment of 3.5% NaCl solution was studied by using the Electrochemical Impedance Spectroscopy (EIS) measurement and adhesion test technology. The experimental result showed that, different mass fractions of nanometer ZnO had different influences on the corrosion resistance property of coating. When the mass fraction of nanometer ZnO was 5%, the composite coating had the largest protective action. The corrosion resistance property of nanometer ZnO can be improved by increasing the density of polyurea coating, however, the corrosion resistance property of polyurea coating will be weakened in case of exceeding the critical adding amount.

Tunnel electron photoemission in the nanoscale DLC film structure with electrostatic field localization

2017 ◽  
Author(s):  
Nikolay P. Aban'shin ◽  
Garif G. Akchurin ◽  
Yuri A. Avetisyan ◽  
Alexander P. Loginov ◽  
Denis S. Mosiyash ◽  
...  
Keyword(s):  
Electrostatic Field ◽  
Film Structure ◽  
Dlc Film ◽  
Electron Photoemission ◽  
Field Localization
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