Influence of hydrostatic pressure on the corrosion behavior of 90/10 copper-nickel alloy tube under alternating dry and wet condition

Hu, Shengbo; Liu, Li; Cui, Yu; Li, Ying; Wang, Fuhui

doi:10.1016/j.corsci.2018.10.036

Cited by 72 publications

(15 citation statements)

References 40 publications

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“…Therefore, the corrosion rate of Cu-Ni alloys in 3.5 wt% NaCl solution was determined at different temperature for E a calculation. The relation between corrosion rate and the temperature is given in the Arrhenius equation (1) [12] C.R = Aexp -Ea/RT (1) where C.R is the corrosion rate of Cu-Ni alloys, A is Arrhenius constant or pre-exponential factor, R is the universal gas constant and T is absolute temperature. Linearization of equation (1) gives equation 2ln C.R = ln A -E a /RT (2) By using potentiodynamic polarization measurements the effect of temperature on Cu-Ni alloys in 3.5 wt% NaCl solution was studied in the temperature extent (25, 50 and 75 0 C).…”

Section: Effect Of Temperature On Cu-ni Alloys In 35 Wt% Nacl Solutionmentioning

confidence: 99%

“…The presence of Cl ─ at such content raises the potential difference across the passive film, thereby enhancing the rate of nickel ions diffusion from the nickel-film interface to the film-solution interface, forming cation vacancies at the Cu-Ni film interface [15]. Some authors have reported that as long as the Ni content in the copper-nickel alloy does not exceed 40 wt%, the Ni compounds would hardly appear in the corrosion product formed in Cl − containing solutions [1]. Also it has been suggested that nickel ions can be incorporated in the Cu oxides as dopants, hence, nickel compounds can hardly be identified through this method.…”

Section: Effect Of Temperature On Cu-ni Alloys In 35 Wt% Nacl Solutionmentioning

confidence: 99%

“…The copper-nickel alloys are one of the major materials used in marine engine condenser piping systems including coastal power plants, desalination plants, line conditioning plant, bases for heat exchangers and condensers together with feed water system heaters, pipelines in shipbuilding, oil tank, paper machine construction, food and drink industry, power stations, chemical industry for fittings, valve fittings, pumps, measuring instruments, stirrer, filling plant, steamship and deep-sea submergence equipment, due to their good mechanical workability, good resistance to chloride erosion, high thermal conductivity and useful resistance to fouling [1]. The interest group in studying the electrochemical corrosion and characteristics of Cu-Ni alloys are because of their good corrosion resistance and the resistance of copper alloys to biological residues.…”

Section: Introductionmentioning

confidence: 99%

“…Studies were perfect in chloride [5,6], in either natural or synthetic sea water, in the absence or presence of sulfide to understand the corrosion mechanism under different conditions. The corrosion of copper-nickel alloys in natural seawater and in solution containing chloride ions has been investigated by many authors [1]. Copper-nickel alloys are widely used in marine environments due to their resistance to corrosion in saline solutions.…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of electrochemical Corrosion of Novel Designs of 90/10 and 70/30 Copper-Nickel Alloys in Brine Solutions

Hussein

Ahmed

2019

Egypt. J. Chem.

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C OPPER-NICKEL alloy is a material of choice for condensers and heat exchangers, where seawater is used as a coolant and in desalination plants. In this work, we survey the comparative corroding behavior of novel designs of 90/10 and 70/30 Copper-Nickel alloys under higher salinity (3.5 wt%, 10 wt% and 15 wt% NaCl). The electrochemical corrosion of Cu-Ni alloys in brine solutions was studied using potentiodynamic polarization, chronoamperometric and electrochemical impedance spectroscopy measurements along with scanning electron microscope (SEM) and energy dispersive X-Ray analyzer (EDX) investigations. Polarization data showed that Cu-10 Ni alloy is more corrosive than Cu-30 Ni alloy in 3.5 wt% NaCl solutions. Chronoamperometric curves confirmed the results obtained by polarization measurements that the uniform and pitting corrosion of Cu-Ni alloy were reduced in the Cu-30 Ni alloy in 3.5wt% NaCl solutions. Impedance spectra revealed that the surface and polarization resistances recorded higher values in Cu-30Ni alloy. SEM/EDX investigations indicated that the corrosion of Cu-Ni alloys proceeded by the selective electro-dissolution of nickel, which allowed copper enrichment on the surface of the alloy. The heat exchanger served to heat desalinated water, the water had a high chloride level. Corrosion examination indicated susceptibility towards pitting corrosion, especially at high temperature.

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Section: Effect Of Temperature On Cu-ni Alloys In 35 Wt% Nacl Solutionmentioning

confidence: 99%

Section: Effect Of Temperature On Cu-ni Alloys In 35 Wt% Nacl Solutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparative study of electrochemical Corrosion of Novel Designs of 90/10 and 70/30 Copper-Nickel Alloys in Brine Solutions

Hussein

Ahmed

2019

Egypt. J. Chem.

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“…manganu. Te stopy charakteryzują się bardzo wysoką odpornością korozyjną dzięki możliwości wytworzenia na ich powierzchni szczelnej warstwy pasywnej [1] i znalazły szerokie zastosowanie w produkcji rurociągów okrętowych mających kontakt z wodą zaburtową, takich jak instalacja chłodzenia silnika głównego czy instalacja przeciwpożarowa [2,5].…”

Section: Wprowadzenieunclassified

The influence of technological errors on the corrosion degradation of the copper alloy from the cunifer group – CuNi10Fe1,6Mn

et al. 2019

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Copper and nickel alloys called cunifers (Cu, Ni, Fe and R – rest of alloy elements) have found wide application in the production of ship pipeline components in contact with sea water, such as, for example, the main engine cooling system. These alloys are characterized by a very high corrosion resistance, which is ensured by appropriately carried out passivation. However, with improperly carried out passivation, this material loses its anti-corrosion properties and is often corroded. In addition, a mistakenly conducted welding process is a factor conducive to degradation processes. The purpose of this work is to show the impact of errors created during the production process and pipeline testing for its technical condition. The subject of the research was a fragment of the pipeline made of CuNi10Fe1,6Mn alloy, coming from a vessel floating on sea waters. Macro- and microscopic examinations revealed a number of technological defects that affected the degradation of this element.

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Microstructure and Corrosion Behavior of Selective Laser‐Melted Al–Ti–Ni Coating on 90/10 Copper–Nickel Alloy

et al. 2022

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Copper-nickel alloys are widely used as corrosion-resistant structural materials because of their good mechanical workability, resistance to chloride erosion, and effective resistance to fouling by microorganisms. Therefore, they are widely used in coastal power plants, desalination plants, pipeline structures, and deep-sea submergence equipment. [1] With the increasing demand for corrosion-resistant materials, enhancing the corrosion-resistant properties of copper-nickel alloys has received widespread attention, [2] and many techniques have been proposed to improve the corrosion resistance of copper-nickel alloys. [3][4][5] Constructing corrosion-resistant coatings for these types of alloys through surface modification is cost-effective, easily accomplished, and designed to enhance the material properties of the alloy. Surface modification methods include spraying, [6,7] electrodeposition, [8,9] electroless plating, [10,11] and microarc oxidation. [12] Coatings prepared by these surface modification techniques are thinner and exhibit better corrosion resistance, [13][14][15][16] but they may suffer from poor coating compactness or weak bonding between the coating and the alloy. [13,17] Compared with the surface modification technologies mentioned above, coatings prepared by laser treatment are characterized by high preparation efficiency, environmental friendliness, good bonding, and high density. [18] Yang et al. [19] investigated the effect of Cr addition on the corrosion resistance of CuAl10 coatings. The corrosion resistance of the coatings was improved because the addition of Cr promoted the formation of a passive film on the coatings, thus reducing the diffusion of Fe from the substrate to the coatings. Also, the passivation ability of the coatings increased with increasing Cr content. Jiao et al. [20] investigated the effect of different Ti additions in Ti15M powders on composite coatings prepared using laser cladding. The results showed that Ti promoted the nucleation of a liquid phase during solidification and that the addition of Ti resulted in a uniform hardness distribution and improved the friction and wear properties of the coatings. Hulka et al. [21] studied the effects of laser power and Ti content on composite coatings prepared from WC-Co/ NiCrBSi powders. When the power was 1600 W, the coating was dense, effectively reducing the diffusion of substrate elements into the cladding layer. When the Ti content was 20%, the cracking susceptibility of the coating was reduced and the hardness was improved. The addition of Ti also effectively improved the corrosion resistance of the composite coatings. Compared with conventional technologies, selective laser melting (SLM) is energy efficient and highly effective. In addition, desirable characteristics such as ultrafine grain organization and a supersaturated solid solution can be obtained using SLM owing to its controlled heating/cooling rate during laser energy input. [22,23] Owing to the complex geometrical processing characteristics of the SLM process...

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Influence of hydrostatic pressure on the corrosion behavior of 90/10 copper-nickel alloy tube under alternating dry and wet condition

Cited by 72 publications

References 40 publications

Comparative study of electrochemical Corrosion of Novel Designs of 90/10 and 70/30 Copper-Nickel Alloys in Brine Solutions

Comparative study of electrochemical Corrosion of Novel Designs of 90/10 and 70/30 Copper-Nickel Alloys in Brine Solutions

The influence of technological errors on the corrosion degradation of the copper alloy from the cunifer group – CuNi10Fe1,6Mn

Microstructure and Corrosion Behavior of Selective Laser‐Melted Al–Ti–Ni Coating on 90/10 Copper–Nickel Alloy

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