The influence of Cu content on the corrosion resistance of Co-Fe-Cu magnetic alloys in aqueous environments

2000 ◽  
Vol 51 (6) ◽  
pp. 418-423 ◽  
Author(s):  
M.P. Gigandet ◽  
F.X. Perrin ◽  
J. Pagetti ◽  
G. Poupon
Keyword(s):  
Corrosion Resistance ◽  
Magnetic Alloys ◽  
Cu Content ◽  
Aqueous Environments

MAGNIFER 8105, 8105 So

Alloy Digest ◽  
2001 ◽  
Vol 50 (11) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Nickel Content ◽  
Heat Treating ◽  
Soft Magnetic ◽  
Magnetic Alloys ◽  
Soft Magnetic Alloys ◽  
Recording Heads ◽  
High Nickel

Abstract Magnifer 8105 and 8105 So are soft magnetic alloys with a high nickel content. Typical applications for 8105 are recording heads, while 8105 So has additional applications. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-575. Producer or source: Krupp VDM GmbH.

NIPPON YAKIN NAS 800

Alloy Digest ◽  
2021 ◽  
Vol 70 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Strength ◽  
Heat Treating ◽  
Chromium Alloy ◽  
Nickel Iron ◽  
Excellent Corrosion Resistance ◽  
Resistance To Oxidation ◽  
Aqueous Environments ◽  
Iron Chromium Alloy ◽  
Iron Chromium

Abstract Nippon Yakin NAS 800 is an austenitic nickel-iron-chromium alloy that exhibits high strength and excellent resistance to oxidation and carburization at high temperatures. It also offers excellent corrosion resistance in many aqueous environments. It is normally employed in service temperatures up to and including 600 °C (1100 °F). This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: Ni-773. Producer or source: Nippon Yakin Kogyo Co., Ltd.

Corrosion Resistance of Mg Alloy with High Zn Concentration Including Impurity Cu

2021 ◽  
Vol 1016 ◽  
pp. 592-597
Author(s):  
Masato Ikoma ◽  
Taiki Morishige ◽  
Tetsuo Kikuchi ◽  
Ryuichi Yoshida ◽  
Toshihide Takenaka
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Mg Alloys ◽  
Mg Alloy ◽  
Second Phase ◽  
Transportation Industry ◽  
Primary Metal ◽  
Cu Content ◽  
Zn Concentration ◽  
Lower Corrosion Rate

Mg alloys are very attractive materials for transportation industry due to their toughness and lightness. Recycling Mg alloys is desired for energy saving that otherwise would be required to produce its primary metal. However, secondary produced Mg tends to contain a few impurity elements that deteriorate its corrosion resistance. For example, contamination of Mg alloy by Cu induces second phase of Mg2Cu and it works as strong cathode, resulting in the corrosion rate rapidly increasing. It was previously reported that the corrosion resistance of Mg with impurity Cu was remarkably improved by addition of alloying element Zn. Addition of Zn into Mg formed MgZn2 phase and incorporated Cu into MgZn2 phase instead of Mg2Cu formation. In this way, since Zn serves to improve the corrosion resistance of Mg, Mg alloy with high Zn concentration may form a lot of MgZn2 and may have better corrosion resistance even with high Cu concentration. In this work, the corrosion behavior of Mg-6mass%-1mass%Al (ZA61) with different Cu content up to 1mass% was investigated. As a result, ZA61-1.0Cu had much lower corrosion rate compared to Mg-0.2%Cu and the corrosion rate was almost the same as that of pure Mg.

Effects of Cu on mechanical properties and corrosion resistance on (Ti36.1Zr33.2Ni5.8Be24.9)100-xCux alloys

2020 ◽  
Vol 10 (6) ◽  
pp. 812-818
Author(s):  
Xiangjie Yang ◽  
Xinhua Huang ◽  
Linhao Zhu ◽  
Hongmin Guo ◽  
Hualan Jin
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Thermal Properties ◽  
Plastic Strain ◽  
Yield Strength ◽  
Metallic Glass ◽  
High Strength ◽  
Mechanical Behaviors ◽  
Cu Content ◽  
Mechanical Properties And Corrosion

Due to high strength, perfect plasticity and higher hardness, bulk metallic glass (BMG) has been widely concerned. The work used the vaccum casting of copper-formed mold to establish (Ti36.1Zr33.2Ni5.8Be24.9)100-xCux, where x = 3, 5, 7, 9 and 11. Thermal properties, mechanical behaviors of compression, and corrosion resistance in the proposed compounds were investigated. The results show that the increase in Cu content enhances the heat resistance and the forming of glass of BMGs, small amount of fine dendritic crystals presents in BMG when x = 3, and the best corrosion resistance and mechanical properties can be obtained when x = 7, the yield strength, fracture strength and plastic strain can reach 1496.15 MPa, 2003.44 MPa and 19.19%, respectively.

Thermodynamic probability analysis of the effects of Rb on the corrosion susceptibility of Cr-containing steels for nuclear materials canisters

CORROSION ◽  
10.5006/3917 ◽  
2021 ◽  
Author(s):  
Kang Wang ◽  
Charles Demarest ◽  
Mathew Asmussen ◽  
John Scully ◽  
Bi-Cheng Zhou
Keyword(s):  
Corrosion Resistance ◽  
Steel Corrosion ◽  
Reaction Products ◽  
Β Decay ◽  
Cr2o3 Scale ◽  
Stable Species ◽  
Aqueous Environments ◽  
Corrosion Susceptibility ◽  
Aisi 4130 ◽  
Thermodynamic Probability

Rubidium (Rb) generated from the β-decay of Kr-85 has been theorized to be corrosive toward steel, specifically in the storage of Kr-85 nuclear waste streams. In the present study, the phase equilibria of RbxCryOz oxides with Rb in dry oxygen and water are investigated to understand a possible pathway to unusual deterioration of the corrosion resistance of canister steels in the presence of Rb. It was found that, in dry oxygen environments, the accumulation of Rb (more than 0.01 mol) can completely consume the Cr in 1 mol of AISI 4130 steel by forming -Rb2CrO4 and Rb3CrO4 and prevent the formation of protective Cr2O3 scale. In aqueous environments, RbxCryOz oxides are metastable species. In order to investigate their role, the probability of forming various oxides is invoked in order to avoid the all-or-nothing approach to oxide formation typical of E-pH diagram, which only predicts the most stable species dissolved, ionized or solid ionized. Thus, the probability of forming RbxCryOz was considered and reported herein. It was found RbxCryOz can possess a larger than 7% probability of forming over Cr2O3 in Rb rich case and 15% in Cr rich case, indicating that it is expected to find small amount of RbxCryOz in the thermodynamically formed reaction products. Even though Cr2O3 is more stable than RbxCryOz oxides, the protective Cr2O3 scale is likely to have some vulnerability to Rb, leading to one possible route for the decline in the corrosion resistance of steel canisters in aqueous environments. Therefore, from a thermodynamic perspective, the current study supports the hypothesis that Rb can thermodynamically react with Cr in steels and can lead to formation of RbxCryOz at certain potentials and pH levels, showing the Rb influence of steel corrosion cannot be discounted. The paper considers experimental mixed potential and pH levels observed and relationship to thermodynamic probability. From this relative corrosion resistance can be assessed in a preliminary way in aqueous environments.

scholarly journals Estimation of Compositions of Zr-Cu Binary Sputtered Film and Its Characterization

2008 ◽  
Vol 2008 ◽  
pp. 1-5 ◽  
Author(s):  
Katsuyoshi Kondoh ◽  
Junji Fujita ◽  
Junko Umeda ◽  
Tadashi Serikawa
Keyword(s):  
Corrosion Resistance ◽  
Surface Film ◽  
Salt Spray ◽  
Rf Magnetron Sputtering ◽  
Xrd Analysis ◽  
Chemical Compositions ◽  
Cu Content ◽  
Sputtered Films ◽  
Small Peak ◽  
Control Chemical

Zr-Cu amorphous films were prepared by radio-frequency (RF) magnetron sputtering on glass substrate using two kinds of the elemental composite targets: Cu chips on Zr plate and Zr chips on Cu plate. It was easy to precisely control chemical compositions of sputtered films by selecting the chip metal and the number of chips. It is possible to accurately estimate the film compositions by using the sputtered area and the deposition rate of Cu and Zr. XRD analysis on every as-sputtered film showed the broadened pattern. Zr-rich composition film, however, revealed a small peak at the diffraction angle of , and Cu-rich one indicated it at . TEM and electron diffraction analysis on the former also showed the main Zr ring patterns and its streaks. Zr-rich composition film with Cu content of 34 at% or less indicated a good corrosion resistance by salt spray test. On the other hand, Cu-rich version with 74 at% Cu or more was poor in corrosion resistance. This was because Zr was reactively passive, and caused the spontaneous formation of a hard non-reactive surface film that inhibited further corrosion than Cu.

Influence of Calcium Addition on the Chemical Durability of the Model Alumino-Silicate Glasses in Aqueous Solutions

2012 ◽  
Vol 512-515 ◽  
pp. 1009-1014
Author(s):  
Dagmar Galusková ◽  
Miroslav Hnatko ◽  
Jozef Kraxner ◽  
Dušan Galusek ◽  
Pavol Šajgalík
Keyword(s):  
Corrosion Resistance ◽  
Grain Boundary ◽  
Aqueous Solutions ◽  
Chemical Durability ◽  
Deionized Water ◽  
Silicate Glasses ◽  
Hydrothermal Conditions ◽  
Aqueous Environments ◽  
Alumino Silicate ◽  
Static Conditions

The corrosion resistance of liquid phase sintered (LPS) alumina ceramics in aqueous environments strongly depends on composition and chemistry of grain boundary glass formed during sintering. The chemical durability of model alumino-silicate glasses with various contents of CaO in aqueous solutions was therefore evaluated. Prepared glasses were corroded under hydrothermal conditions in deionized water under static conditions. The examination of surface morphology of corroded specimens after the contact with deionized water, together with the analysis of corrosion solution provided information on mechanism of dissolution of grain boundary glasses in LPS aluminas and confirmed that dissolution process is hindered due to saturation of solution with respect to leached elements. The initial dissolution rates for studied glasses were determined. The results are applicable for optimization and enhancement of corrosion resistance of LPS alumina under hydrothermal conditions.

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