Effect of chloride and sulphate anions as minor impurities in silicate alkaline electrolyte on plasma electrolytic oxidation of aluminium alloys

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Effect of chloride and sulphate anions as minor impurities in silicate alkaline electrolyte on plasma electrolytic oxidation of aluminium alloys. / Terleeva, O. P.; Slonova, A. I.; Rogov, A. B. et al.

In: Materials Research Express, Vol. 6, No. 1, 015009, 01.01.2019.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{e38d4c839f0d4b09b12081770989e9c7,

title = "Effect of chloride and sulphate anions as minor impurities in silicate alkaline electrolyte on plasma electrolytic oxidation of aluminium alloys",

abstract = "In this paper, the effect of minor impurities contained in tap water has been evaluated in respect of plasma electrolytic oxidation of aluminium alloys in alkaline silicate electrolyte. It was found that chloride and sulphate anions are the main detrimental impurities in tap water for PEO process. PEO processes were carried out with 2024 and 1230 Al alloys. PEO process in electrolyte based on distilled water was taken as a reference. Process evaluation was performed by analysis of anodic voltage behaviour in a time chart form, coating cross sections (SEM and optically), final coating thickness as well as average microhardness. The comparative analysis showed that presence of either chloride or sulphate anions hinders PEO process, reduces process efficiency i.e. final coating thickness. However, it was found that the decrease in process efficiency was not attributed to the destruction of metal-coating interface. Therefore, an extension of the process for about 25% could compensate the reduced efficiency of PEO in electrolytes based on tap water. Moreover, it was found that presence of carbonate improved the efficiency of the PEO coating formation.",

keywords = "electrolyte solution, impurities, microhardness, plasma electrolytic oxidation, tap water, MICROPLASMA COATINGS, MECHANISM, AL, CATHODIC CURRENT, MAGNESIUM, INDUCED ATMOSPHERIC CORROSION, TEMPERATURE, PEO, PITTING CORROSION, MORPHOLOGY",

author = "Terleeva, {O. P.} and Slonova, {A. I.} and Rogov, {A. B.} and Kokovkin, {V. V.} and Mironov, {I. V.}",

year = "2019",

month = jan,

day = "1",

doi = "10.1088/2053-1591/aae3f4",

language = "English",

volume = "6",

journal = "Materials Research Express",

issn = "2053-1591",

publisher = "IOP Publishing Ltd.",

number = "1",

}

RIS

TY - JOUR

T1 - Effect of chloride and sulphate anions as minor impurities in silicate alkaline electrolyte on plasma electrolytic oxidation of aluminium alloys

AU - Terleeva, O. P.

AU - Slonova, A. I.

AU - Rogov, A. B.

AU - Kokovkin, V. V.

AU - Mironov, I. V.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - In this paper, the effect of minor impurities contained in tap water has been evaluated in respect of plasma electrolytic oxidation of aluminium alloys in alkaline silicate electrolyte. It was found that chloride and sulphate anions are the main detrimental impurities in tap water for PEO process. PEO processes were carried out with 2024 and 1230 Al alloys. PEO process in electrolyte based on distilled water was taken as a reference. Process evaluation was performed by analysis of anodic voltage behaviour in a time chart form, coating cross sections (SEM and optically), final coating thickness as well as average microhardness. The comparative analysis showed that presence of either chloride or sulphate anions hinders PEO process, reduces process efficiency i.e. final coating thickness. However, it was found that the decrease in process efficiency was not attributed to the destruction of metal-coating interface. Therefore, an extension of the process for about 25% could compensate the reduced efficiency of PEO in electrolytes based on tap water. Moreover, it was found that presence of carbonate improved the efficiency of the PEO coating formation.

AB - In this paper, the effect of minor impurities contained in tap water has been evaluated in respect of plasma electrolytic oxidation of aluminium alloys in alkaline silicate electrolyte. It was found that chloride and sulphate anions are the main detrimental impurities in tap water for PEO process. PEO processes were carried out with 2024 and 1230 Al alloys. PEO process in electrolyte based on distilled water was taken as a reference. Process evaluation was performed by analysis of anodic voltage behaviour in a time chart form, coating cross sections (SEM and optically), final coating thickness as well as average microhardness. The comparative analysis showed that presence of either chloride or sulphate anions hinders PEO process, reduces process efficiency i.e. final coating thickness. However, it was found that the decrease in process efficiency was not attributed to the destruction of metal-coating interface. Therefore, an extension of the process for about 25% could compensate the reduced efficiency of PEO in electrolytes based on tap water. Moreover, it was found that presence of carbonate improved the efficiency of the PEO coating formation.

KW - electrolyte solution

KW - impurities

KW - microhardness

KW - plasma electrolytic oxidation

KW - tap water

KW - MICROPLASMA COATINGS

KW - MECHANISM

KW - AL

KW - CATHODIC CURRENT

KW - MAGNESIUM

KW - INDUCED ATMOSPHERIC CORROSION

KW - TEMPERATURE

KW - PEO

KW - PITTING CORROSION

KW - MORPHOLOGY

UR - http://www.scopus.com/inward/record.url?scp=85056098455&partnerID=8YFLogxK

U2 - 10.1088/2053-1591/aae3f4

DO - 10.1088/2053-1591/aae3f4

M3 - Article

AN - SCOPUS:85056098455

VL - 6

JO - Materials Research Express

JF - Materials Research Express

SN - 2053-1591

IS - 1

M1 - 015009

ER -

ID: 18070795