The Effect of Microarc Oxidation (M AO ) Modes on Corrosion Behavior of High - Silicon Aluminum Alloy

Kiselyeva, S. K.; Zaynullina, L. I.; Abramova, Marina M.; Dudareva, N. Yu.; Alexandrov, Igor

doi:10.25103/jestr.075.10

Cited by 3 publications

(4 citation statements)

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“…The most common electrolytes are based on distilled water with the addition of water glass (Na 2 SiO 3 ) and sodium or potassium hydroxide (KOH/NaOH). These components are included in the electrolyte in small quantities of 1 -12 g/l [10,21].…”

Section: The Methodology Of the Researchsmentioning

confidence: 99%

“…The chemical composition of the alloy is shown in Table . 1 It is known that the composition of the electrolyte is the most important factor influencing the quality and corrosion resistance of MAO layer [21]. Electrolyte components and elements are included in the coating composition in the form of salts, oxides and hydroxides of complex composition, and, the longer the processing items performed, the more elements from the electrolyte are accumulated in the surface layer.…”

Section: The Methodology Of the Researchsmentioning

confidence: 99%

“…From the analysis of the literature [10,21] approximate value range of factors is known, in which one can get coating with optimum microhardness and thickness. In this study, as the major process factors were chosen: х 1 -concentration of water glass (Na 2 SiO 3 ) in the electrolyte (C lq ), g/l; х 2 -the concentration of potassium hydroxide (KOH) in electrolyte С КОН , g/l; х 3 -electric capacitance (C) of the installation of MAO, uF.…”

Section: The Methodology Of the Researchsmentioning

confidence: 99%

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Corrosion-Resistance of MAO-Coatings on Al-Si Alloys

Dudareva

Abramova

Kalschikov

2016

MSF

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The results of the experimental study of the influence of micro-arc oxidation (MAO) on the corrosion resistance of aluminum alloy samples AK12D are presented in this paper. The description of the research methodology, including the formation of the hardened layer on the surface of laboratory samples by MAO under various process conditions and the study of their corrosion resistance are given. The studies were conducted in accordance with the experimental design theory for fractional factorial experiment 23-1. The MAO process was carried out using an alkaline electrolyte. MDO process factors were chosen according to an electrolyte concentration of the components (caustic potash - KOH and water glass - Na2SiO3) and electrical parameters of the process determined by the capacitors capacitance. In addition to corrosion resistance of the samples, the thickness, porosity, and microhardness of MAO layer were determined. Regression equations and conclusions about the degree of influence of modes of micro-arc oxidation on the corrosion resistance of the samples were compiled on the basis of the data obtained. The results showed that the MAO process regimes have a significant effect on the corrosion resistance of the samples. Regression equations describing the effect of the thickness and porosity of the surface on the corrosion rate are derived. It has been found that the greatest influence on the corrosion resistance renders the mean value of porosity. With an increase of this parameter there is an increase in the corrosion resistance of the coating. To account for this effect, it has been suggested that the corrosion resistance of the MAO layer should not correlate with the porosity but with the absolute volume occupied by the pores in the coating. The study was conducted to investigate the prospects for the use of the MAO method for improving the corrosion properties of parts and details made of Al-Si aluminum alloys.

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Section: The Methodology Of the Researchsmentioning

confidence: 99%

Section: The Methodology Of the Researchsmentioning

confidence: 99%

Section: The Methodology Of the Researchsmentioning

confidence: 99%

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Corrosion-Resistance of MAO-Coatings on Al-Si Alloys

Dudareva

Abramova

Kalschikov

2016

MSF

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“…The corrosion rate was calculated in mils per year (mpy), utilising the weight loss method [54,55] , in accordance with ASTM G1-03 [42,50,56]:…”

Section: Determination Of the Corrosion Ratementioning

confidence: 99%

Effect of Residual Chlorine on Copper Pipes in Drinking Water Systems

García-Ávila¹,

Pino²,

Bonifaz-Barba³

et al. 2019

JESTR

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Copper pipes corrosion that transport potable water can deteriorate water quality within a distribution system, releasing high copper amounts, exceeding the maximum concentration copper for potable water standards. This study examines the influence of free chlorine on the leaching of copper in the pipes used for the distribution of drinking water. A series of tests was carried out using corrosion test coupons extractable constructed of copper material. The coupons were installed in units containing filtered water (without chlorine, 0 mg/L) and water treated with an average residual chlorine concentration of 0.85 mg/L in the water treatment plant in Azogues city, Ecuador. A corrosion test rack was also installed in a house with an average residual chlorine concentration of 0.37 mg/L. Coupons in these sites were exposed in duplicate for one, two, three and six months. The corrosion coupons were then extracted and weighed to establish the corrosion rate by gravimetric technique. Additional tests were performed in static immersion laboratory tests using drinking water with chlorine concentrations ranging from 0.25 to 5 mg/L for one month. The weight loss tests indicated that an increase in free chlorine concentration, the greater release of copper and therefore a higher corrosion rate.

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Feasibility Study on the MAO- and SH-coated Cylinder Liners Application in ICE

Dudareva

Musin

2017

Procedia Engineering

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The Effect of Microarc Oxidation (M AO ) Modes on Corrosion Behavior of High - Silicon Aluminum Alloy

Cited by 3 publications

References 0 publications

Corrosion-Resistance of MAO-Coatings on Al-Si Alloys

Corrosion-Resistance of MAO-Coatings on Al-Si Alloys

Effect of Residual Chlorine on Copper Pipes in Drinking Water Systems

Feasibility Study on the MAO- and SH-coated Cylinder Liners Application in ICE

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