scholarly journals Effect of oxidation of nitride coatings on corrosion properties of Ti-6Al-4V alloy in 0.9% NaCl at 40°C

2014 ◽  
Vol 12 (2) ◽  
pp. 260-265 ◽  
Author(s):  
Iryna Pohrelyuk ◽  
Oleh Tkachuk ◽  
Roman Proskurnyak
Keyword(s):  
Corrosion Properties ◽  
Protective Properties ◽  
Nitride Coatings ◽  
Nitrided Surface ◽  
Oxynitride Film

AbstractThe corrosion properties of Ti-6Al-4V alloy with oxidized thermodiffusion nitride coatings were investigated in isotonic 0.9% solution of NaCl at temperature of 40°C. It was shown that modification of nitride coatings by oxygen leads to a deterioration of the protective properties of nitrided surface of Ti-6Al-4V alloy. The protective properties of the alloy with nitride coatings modified by oxygen are determined by the composition of formed surface oxynitride film.

scholarly journals Analysis of corrosive properties of zinc-containing coatings based on dispersed waste hot zinc plating

2020 ◽  
pp. 106-112
Author(s):  
N. I. Urbanovich ◽  
K. E. Baranovsky ◽  
E. V. Rozenberg ◽  
T. I. Bendik ◽  
A. A. Karpenkin ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Comparative Analysis ◽  
Electrochemical Method ◽  
Salt Spray ◽  
Metallic Powder ◽  
Spray Chamber ◽  
Corrosion Properties ◽  
Protective Properties ◽  
Zinc Plating

A comparative analysis of the corrosion properties of zinc-containing coatings obtained on the basis of metallic powder zinc and dispersed hot-dip galvanized waste has been carried out. The results of a study of the corrosion resistance of zinc-containing coatings by the electrochemical method and in a salt spray chamber have shown that coatings obtained on the basis of dispersed hot-dip galvanized waste are not inferior in protective properties to coatings based on powder standard zinc.

Electrochemical Synthesis, Characterization and Corrosion Properties of POA−MoO42- Coating in 3.5% NaCl

2020 ◽  
Vol 22 (4) ◽  
pp. 263
Author(s):  
Ye.G. Bakhytzhan ◽  
A.M. Argimbayeva ◽  
G.S. Rakhymbay ◽  
R.Dzh. Jumanova ◽  
Kh. Avchukir ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electrochemical Method ◽  
Steel Grade ◽  
Nacl Solution ◽  
Corrosion Properties ◽  
Adhesion Properties ◽  
Protective Properties ◽  
X Ray ◽  
Scanning Electron

Polyanisidine (POA) and polyanisidine-molybdate (POA−MoO42-) coatings have been successfully synthesized on steel grade СТ3 from aqueous solutions of oxalic acid by electrochemical method using cyclic voltammetry. The morphology and composition of these films were characterized by scanning electron microscopy (SEM) and energydispersive X-ray (EDAX) methods. It was proven that the introduction of MoO42- into the polyanisidine matrix raised the corrosion resistance of the POA coating and also improved its adhesion properties. The protective properties of steel grade CT3 with POA and POA-MoO42- films were studied using potentiodynamic polarization in 3.5% NaCl solution. The results showed that ions improve anti-corrosion properties of POA films.

Protective Properties of Aluminum Nitride Coatings by DC-PVD Sputtering on Cu-10Al-13Mn Shape Memory Alloy

2018 ◽  
Vol 27 (12) ◽  
pp. 6365-6373 ◽  
Author(s):  
Mirali Seyed Shariatdoust ◽  
Hossein Aghajani
Keyword(s):  
Shape Memory Alloy ◽  
Aluminum Nitride ◽  
Shape Memory ◽  
Protective Properties ◽  
Nitride Coatings

ELECTROCHEMICAL TECHNIQUES TO AID IN THE DEVELOPMENT OF IMPROVED CARBON OVERCOATS ON MAGNETIC STORAGE MEDIA

2002 ◽  
Vol 16 (06n07) ◽  
pp. 968-972
Author(s):  
D. J. BLACKWOOD ◽  
CHEE JOO GOH ◽  
B. TOMCIK
Keyword(s):  
Electrochemical Techniques ◽  
Electrochemical Technique ◽  
Magnetic Storage ◽  
Carbon Overcoat ◽  
Corrosion Properties ◽  
Protective Properties ◽  
Storage Media ◽  
Surface Analysis Techniques ◽  
Carbon Overcoats ◽  
Magnetic Storage Media

With the trend of decreasing the thickness of the carbon overcoat on high-density magnetic recordings, the corrosion properties of a hard disk multilayer structure are becoming a hot issue. An ideal overcoat would be uniform across the disk's surface, have low porosity and electrical conductivity as well as being impermeable to water. However, in reality this is not viable and corrosion is inevitable. One possible method of improving the corrosion resistance of carbon overcoats is to introduce carbide bilayers. In this paper the corrosion protective properties of CrC/C and BC/C nanolaminated overcoat structures have been analyzed by an electrochemical technique based on LPR measurements. The results allowed an overcoat's resistance to be correlated to its porosity and a statistical method was developed to allow easy comparison of results. The results from the electrochemical measurements were correlated with a range of surface analysis techniques.

Synthesis and protective properties of titanium nitride coatings on willemite

2012 ◽  
Vol 85 (7) ◽  
pp. 1070-1076 ◽  
Author(s):  
E. A. Sosnov ◽  
A. A. Malkov ◽  
A. A. Malygin
Keyword(s):  
Titanium Nitride ◽  
Protective Properties ◽  
Nitride Coatings

scholarly journals Ways to improve the anticorrosive properties of motor oils used in vehicles

2021 ◽  
Vol 264 ◽  
pp. 05004
Author(s):  
Zebo Alimova ◽  
Ravshanjon Akhmatjanov ◽  
Nargiza Kholikova ◽  
Kamola Karimova
Keyword(s):  
Orthophosphoric Acid ◽  
Combustion Engine ◽  
Oxidation Products ◽  
Lubricating Oil ◽  
Corrosion Properties ◽  
Protective Properties ◽  
Combined Action ◽  
Oil Water ◽  
The One ◽  
Motor Oils

In recent years, increased requirements for protective properties have been imposed on petroleum oils for various purposes. One of the functions of the oil is to protect the surface of parts from corrosion. Corrosion becomes especially intense when the engine is operated in hot, humid climates. In this case, oil plays a double role: on the one hand, it protects the surfaces of parts from the aggressive influence of the external environment; on the other hand, the oil itself is corrosive due to the presence of corrosive substances in it. Corrosion is especially intensified after the engine is stopped. When it cools, moisture condenses on the parts, the lubricating oil, flowing down from the lubricated surface, cannot protect the metal from corrosion. The reason for the corrosive properties of oils is that they contain organic and inorganic acid peroxides and other oxidation products and sulfur compounds, alkalis, and water. The purpose of this work is to study and improve the anti-corrosion properties of lubricants. With an increase in temperature, the combined action of oxygen in the air and water present in the lubricating oil causes rusting of the crankshaft, liner walls, cylinders of the internal combustion engine. We have studied anticorrosive additives as an additive to improve the anti-corrosion properties of oils. Dialkylphenyl orthophosphoric acid additive was used as such additives. The anticorrosive activity of these substances is related to their ability to orient themselves on the oil-water surface so that hydrophilic groups are firmly bound to water while the hydrocarbon radical remains in the oil.

scholarly journals Effect of Functionalization of Reduced Graphene Oxide Coatings with Nitrogen and Sulfur Groups on Their Anti-Corrosion Properties

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1410
Author(s):  
Karolina Ollik ◽  
Jakub Karczewski ◽  
Marek Lieder
Keyword(s):  
Photoelectron Spectroscopy ◽  
Quantitative Composition ◽  
Oxide Coatings ◽  
Spectroscopy Analysis ◽  
Corrosion Properties ◽  
Protective Properties ◽  
Qualitative And Quantitative ◽  
Adhesive Surface ◽  
Reduced Graphene ◽  
Hydrothermal Reduction

Electrophoretic production of anticorrosion carbonaceous coatings on copper could be successfully performed by anodic oxidation of negatively charged graphene platelets suspended in an aqueous solution. The various platelets were synthesized by Hummer’s method followed by a hydrothermal reduction in the presence of NH4SCN which was expected to substitute some parts of graphene structure with nitrogen and sulfur groups. X-ray photoelectron spectroscopy analysis confirmed that the graphene precursors, as well as the coatings, contained typical nitrogen groups, such as pyridinic and pyrrolic, and sulfur groups, such as thiol, thiophene, or C-SO2. However, due to oxidation during deposition, the qualitative and quantitative composition of the graphene coatings changed relative to the composition of the precursors. In particular, the concentration of nitrogen and sulfur dropped and some thiophene groups were oxidized to C-SO2. Studies showed the functionalized coatings had a uniform, defect-free, hydrophobic, more adhesive surface than nonmodified films. The corrosion measurements demonstrated that these coatings had better protective properties than the ones without these heteroatoms. This behavior can be assigned to the catalytic activity of nitrogen towards oxidation of C-SO2 groups to C-SO3H with oxygen.

Mechanical Properties and Bio-Corrosion Properties of CaO added ZM21 alloys as Biodegradable Materials

2014 ◽  
Vol 52 (11) ◽  
pp. 949-956
Author(s):  
Hyunkyu Lim ◽  
Wonseok Yang ◽  
Young-Gil Jung ◽  
Shae K. Kim ◽  
Do-Hyang Kim
Keyword(s):  
Mechanical Properties ◽  
Biodegradable Materials ◽  
Corrosion Properties

Influence of Current Density on Corrosion Properties of AZ91 Mg Alloy Coated by Plasma Electrolytic Oxidation Method

2011 ◽  
Vol 49 (08) ◽  
pp. 601-607 ◽  
Author(s):  
Byung Uk Lee ◽  
In Jun Hwang Hwang ◽  
Jae Sik Lee ◽  
Young Gun Ko ◽  
Dong Hyuk Shin
Keyword(s):  
Current Density ◽  
Plasma Electrolytic Oxidation ◽  
Mg Alloy ◽  
Corrosion Properties ◽  
Oxidation Method ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic
Sign in / Sign up

Export Citation Format

Share Document