Static corrosion of niobium by molten uranium-chromium eutectic

The anti-corrosion performance of Tiangang TP95S casing steel was studied by high temperature autoclaves simulating the high-temperature and high-pressure H2S/CO2 environment. The experimental results show that the corrosion rates increase with the rising of temperature which is from 40°C to 80°C under the dynamic and static conditions of the simulated environments; the dynamic corrosion rates are between 1.7294 and 1.8601mm/a and the corrosion rates are 0.4264～1.2715mm/a under the static conditions, both of which belong to a serious corrosion category; the dynamic corrosion samples have had the localized corrosion at 40°C, but the local corrosion of the static corrosion specimens appeared at 80°C; the corrosion product of TP95S steel takes FeS as the core in the case of static corrosion at 40°C.

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Cause Analysis and Processing of Propylene Gas Compressor Bearing Vibration

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.331.102 ◽

2013 ◽

Vol 331 ◽

pp. 102-105

Author(s):

Hui Cao ◽

Yan Liu ◽

Chang Ji Lin

Keyword(s):

Safe Operation ◽

Upward Trend ◽

The Core ◽

Safe Production ◽

Fundamental Reason ◽

Process Operation ◽

Normal Production ◽

Bearing Vibration ◽

Time Move ◽

Static Corrosion

In certain company, propylene gas centrifugal compressor is one of the core units of ethylene cracker. The machine has been running smoothly since put into operation, its bearing system never appeared abnormal. In October 2011, the low pressure side of bearing started to show abnormal vibration, as time move on, the vibration values showed an upward trend, which reached 45um by the end of November. This abnormal vibration brings significant hazards to the safe operation of the device, and could affect the normal production of the cracker and its downstream units and lead to huge loss. Therefore, to eliminate hidden dangers and ensure safe production, the device was disassembled and checked. After analysis, it was found that, the fundamental reason for bearing vibration was static corrosion. Measures like process operation adjustment were adopted, which solved the vibration problem completely and provided guarantee for the long period safe operation of the device.

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Screening Test of Phosphoric Acid-BTA Slurries for Copper ECMP Based on Static Inhibition Efficiency

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.920 ◽

2011 ◽

Vol 239-242 ◽

pp. 920-923 ◽

Cited By ~ 1

Author(s):

Wen Jie Zhai ◽

Yang Zhan Yang

Keyword(s):

Phosphoric Acid ◽

Corrosion Test ◽

Material Removal ◽

Inhibition Efficiency ◽

Removal Rate ◽

Linear Sweep Voltammetry ◽

Linear Sweep ◽

Anodic Current ◽

Screening Protocol ◽

Static Corrosion

An ECMP slurry screening protocol is proposed based on inhibition efficiency of inhibitor in copper static corrosion test, aiming at enhancing the planarization efficiency of copper ECMP slurries. The elctrochemical properties of copper in electrolytes including H3PO4 and BTA with different concentrations are studied basing on Linear Sweep Voltammetry (LSV) and chronoamperometry under static corrosion states. According to analysis of the anodic current, material removal rate (MRR) and inhibition efficiency of BTA, an electrolyte formula of 30 wt% H3PO4+0.01M BTA is sort out and the anodic potential on copper should be set below 0.5 V.

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Corrosion Behavior of Human Teeth Measured by Nanoindentation Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.606.145 ◽

2014 ◽

Vol 606 ◽

pp. 145-148

Author(s):

Monika Kašiarová ◽

Dagmar Galusková ◽

Zuzana Vilčeková ◽

Peter Tatarko ◽

Petra Gaalová ◽

...

Keyword(s):

Mechanical Properties ◽

Elastic Modulus ◽

Corrosion Behavior ◽

Outer Layer ◽

Corrosion Test ◽

White Wine ◽

Human Teeth ◽

Natural Surface ◽

Order Of Magnitude ◽

Static Corrosion

The decrease of the mechanical properties – hardness and reduced elastic modulus after corrosion in white wine was measured. Under static corrosion conditions no significant decrease was observed up to 8 hours of corrosion. Dynamic corrosion conditions cause detrimental decrease of properties (one order of magnitude) compare to the results of static corrosion test. This is due to the removal of the harder outer layer of the enamel during polishing. To obtain a relevant data concerning corrosion test, natural surface of a tooth should be investigated and tested.

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Static Corrosion of Aluminum in High Purity Water Below 100℃

Journal of The Electrochemical Society of Japan ◽

10.5796/jesj.31.1-2.54 ◽

1963 ◽

Vol 31 (1-2) ◽

pp. 54-61

Author(s):

Yasuko KONDO ◽

Sueo NOMURA

Keyword(s):

High Purity ◽

Static Corrosion

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The Effect of the Formation of Superelastic NiTi Phase on Static and Dynamic Corrosion Performance of Ni-P Coating

Solids ◽

10.3390/solids2030018 ◽

2021 ◽

Vol 2 (3) ◽

pp. 278-292

Author(s):

Zhi Li ◽

Zoheir Farhat

Keyword(s):

Corrosion Resistance ◽

Composite Coatings ◽

Corrosion Performance ◽

Abrasive Particles ◽

Aggressive Environment ◽

Corrosion Rates ◽

Niti Phase ◽

Order Of Magnitude ◽

Steel Substrates ◽

Static Corrosion

The addition of superelastic NiTi particles is a great benefit to the toughness of the Ni-P coating. Nonetheless, NiTi nanopowder costs 10 times more than Ti nanopowder. Therefore, in the present study, to reduce the cost, Ni-P-NiTi composite coatings were prepared on AISI 1018 steel substrates by the electroless incorporation of Ti nanoparticles into Ni-P followed by the annealing of Ni-P-Ti coatings. The effect of the formation of a superelastic NiTi phase on static and dynamic corrosion performance was investigated. It was found that the annealed Ni-P-Ti coating (i.e., Ni-P-NiTi coating) has much higher static corrosion resistance than the as-deposited Ni-P coating. The dynamic corrosion rates in the absence of abrasive particles are 10 times higher than the static corrosion rates of the coatings. The dynamic corrosion rates in the presence of abrasive particles are one order of magnitude higher than the dynamic corrosion rates in the absence of abrasive particles. The formation of a superelastic NiTi phase considerably improved the static and dynamic corrosion performance of the Ni-P coating. In the absence of abrasive particles under flowing condition, the dynamic corrosion resistance of the annealed Ni-P-Ti coating (i.e., Ni-P-NiTi coating) is 19 times higher than that of the as-deposited Ni-P coating. In the most aggressive environment (in the presence of abrasive particles), the dynamic corrosion resistance of the annealed Ni-P-Ti coating (i.e., Ni-P-NiTi coating) is four times higher than that of the as-deposited Ni-P coating. The annealed Ni-P-Ti coating (i.e., Ni-P-NiTi coating) can be used in applications where high corrosion resistance is required, especially in an extremely aggressive environment.

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