Research of Anti-Corrosion of Armour Steel in Surface Chromate Conversion Coating

2013 ◽  
Vol 734-737 ◽  
pp. 2332-2337
Author(s):  
Rui Hua Guo ◽  
Fang Sheng Liu ◽  
Lin Min Wang
Keyword(s):  
Corrosion Resistance ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Electrochemical Method ◽  
Electrochemical Corrosion ◽  
Conversion Coating ◽  
Chromate Conversion Coating ◽  
Conversion Time ◽  
Armour Steel ◽  
The Rare Earth

This article by orthogonal experimental method to determine the composition of chromate conversion and use of electrochemical method of electrochemical corrosion of the film discussed the substrate in different components, content, time and pH of chromate conversion coating of corrosion resistance. Orthogonal to determine the best experimental chromate conversion solution by adding the rare earth element cerium and lanthanum salt, and discuss the effects of rare earth elements cerium and lanthanum chromate conversion film on the anti-corrosion. The results show that in CrO3 5.4 g/L, NaF 0.5 g/L, K3Fe (CN)6 0.5 g/L, pH 1, conversion time is three minutes, there is a better corrosion resistance. The rare earth elements in a chromate conversion solution, La2(CO3)3 to 0.2 g/L chromate conversion coating of the anti-corrosion better.

The Corrosion Mechanism of Cu-Containing Weathering Steel in a Cyclic Dry-Wet Condition

2009 ◽  
Vol 79-82 ◽  
pp. 957-960 ◽  
Author(s):  
Li Jie Yue ◽  
Wei Gong Chen
Keyword(s):  
Corrosion Resistance ◽  
Rare Earth ◽  
Corrosion Product ◽  
Resistance Mechanism ◽  
Electrochemical Corrosion ◽  
Weathering Steel ◽  
Corrosion Mechanism ◽  
Steel Matrix ◽  
Rust Layer ◽  
The Rare Earth

The weather resistance of 10CuPRE、10CuP and Q235 steels were studied by dry-wet cyclic immersion test. The corrosion resistance mechanism of rare earth Cu-containing weathering steel was studied through electrochemical polarization test, scanning electron microscope(SEM) and X ray diffraction(XRD). The results show the small and spherical rare earth oxysulfides replace the elongated MnS inclusions in the rare earth weathering steel. Less and fewer rare earth oxysulfides heavily decrease pitting susceptibility and rate of pit propagation. So the electrochemical corrosion of microarea in the steel matrix is weakened after rare earth was added in the Cu-containing weathering steel. The inner rust layer of rare earth weathering steel is more compact and uniform than that of weathering steel without rare earth. The main corrosion product on the rare earth weathering steel is α-FeOOH. The formation of the steady corrosion product is promoted by rare earth, which result in that the protective property of the inner rust layer on weathering steels is enhanced. As a result, the corrosion resistance of Cu-containing weathering steel is improved by rare earth elements.

Corrosion Behavior of Rare Earth Cerium Based Trivalent Chromium Conversion Coating on Zinc

2014 ◽  
Vol 881-883 ◽  
pp. 1165-1170 ◽  
Author(s):  
Shu Ting Miao ◽  
Sheng Han ◽  
Lifeng Hao
Keyword(s):  
Electron Microscopy ◽  
Corrosion Resistance ◽  
Rare Earth ◽  
Electrochemical Method ◽  
Trivalent Chromium ◽  
Conversion Coating ◽  
Passivation Film ◽  
Good Corrosion Resistance ◽  
Scanning Electron ◽  
Cerium Hydroxide

The present paper focused on the use of the salt of rare earth cerium as corrosion inhibitor of Zinc by using cathodic electrolytic passivation method. The corrosion resistance and the microphology of the cerium passivation film were studied by the methods of electrochemical method, scanning electron microscopy (SEM). From the results, it was shown that good corrosion resistance of cerium-based trivalent chromium conversion coating was obtained when the compositions were as follows: Ce (SO4)2, 6g/L; Cr2(SO4)3, 18.9g/L and NaNO3; current density, 2A/dm2; temperature, 40 oC; time, 60s. SEM revealed that the cerium trivalent chromium conversion coatings formed uniform cerium hydroxide and chrimuim hydroxide deposition on the surface of Zinc.

Influence of Conversion Coating Conditions with Rare Earth Elements on Corrosion Resistance of Mg Alloys

2019 ◽  
Vol 16 (43) ◽  
pp. 39-46 ◽  
Author(s):  
Nobuo Uesaka ◽  
Yuichi Shikai ◽  
Toshihide Takenaka
Keyword(s):  
Corrosion Resistance ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Conversion Coating ◽  
Mg Alloys

Flame spectra of the rare-earth elements*

1962 ◽  
Vol 18 (4) ◽  
pp. 1127-1153
Author(s):  
V FASSEL ◽  
R CURRY ◽  
R KNISELEY
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
The Rare Earth

ALUCHROM I SE

Alloy Digest ◽  
2001 ◽  
Vol 50 (5) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Rare Earth ◽  
High Temperature ◽  
Rare Earth Elements ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Temperature Performance ◽  
Oxidation Resistant

Abstract Aluchrom I SE is an oxidation resistant ferritic stainless steel alloyed with aluminum and rare earth elements. Applications include framework for catalytic automobile muffler systems. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-823. Producer or source: Krupp VDM.

scholarly journals Rationally designed mineralization for selective recovery of the rare earth elements

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Takaaki Hatanaka ◽  
Akimasa Matsugami ◽  
Takamasa Nonaka ◽  
Hideki Takagi ◽  
Fumiaki Hayashi ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Selective Recovery ◽  
The Rare Earth
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