Investigation of corrosion resistance of aluminum alloy products with protective coatings formed by plasma electrolytic oxidation

Kolomeichenko, A. V.; Chernyshov, N. S.; Titov, N. V.; Logachev, V. N.

doi:10.3103/s1068375517040081

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…The technology of microarc oxidation (MAO) is becoming increasingly popular in industry at this time [1,2]. This method allows the formation of modified surface layers with a unique combination of properties: high wear resistance, corrosion resistance and heat resistance [3,4]. The wear resistance and corrosion resistance of MAO coatings are well studied nowadays.…”

Section: Introductionmentioning

confidence: 99%

“…The investigation of the thermophysical properties of the MAO layers is a difficult methodical task, since these coatings are ceramics with an inhomogeneous and complex chemical composition. Such coatings are characterized by high porosity and uneven thickness [2,4]. For this reason, the total number of works about the measurement of the thermophysical properties of MAO layers is extremely small.…”

Section: Introductionmentioning

confidence: 99%

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Method for determining of the coatings thermophysical properties formed by the microarc oxidation

2019

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In this work are determined the thermophysical parameters (coefficient of thermal conductivity, thermal diffusivity and heat capacity) of a coating formed by the microarc oxidation (MAO) method on an aluminum alloy AK12D. A method for determining the thermal properties of the MAO layers was developed and verified. The technique is based on measuring the thermal conductivity of the layer by pulsed laser heating and calculating its heat capacity and density based on the data of layer-by-layer phase analysis taking into account the volume porosity. The method allows to calculate the thermophysical parameters whose values differ from the experimental no more than 2.2% in thermal conductivity and no more than 7.0% for heat capacity. In accordance with the proposed method, it was found that the MAO layer on AK12D alloy has a low thermal conductivity of ~ 1.57 W/(m·K) at 100 °C.

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