METHOD OF PRELIMINARY DETERMINATION OF SUITABILITY OF ALUMINIUM ALLOYS TO TREATMENT WITH MICRO-ARC OXIDATION, AND OF THICKNESS, HARDNESS AND BREAKDOWN VOLTAGE OF MANUFACTURED COATING Russian patent published in 2011 - IPC C25D11/00 

FIELD: metallurgy.

SUBSTANCE: method consists in determination of composition of assessed alloys and in calculation of three coefficients of each of alloys by formulas: kδ_i=1-(0.07·C_Cu+0.02·C_Mg+0.06·C_Mn+0.06·C_Fe+0.04·C_Si+0.06·C_Zn+0.04·C_oth), kH_i=1-(0.06·C_Cu+0.015·C_Mg+0.05·C_Mn+0.05·C_Fe+0.03·C_Si+0.05·C_Zn+0.03·C_oth), kU_i=1-(0.10·C_Cu+0.02·C_Mg+0.06·C_Mn+0.07·C_Fe+0.04·C_Si+0.07·C_Zn+0.06·C_oth), where kδ_i, kH_i, kU_i are dimensionless coefficients considering influence of components on thickness, hardness and breakdown voltage of coating, C_Cu, C_Mg, C_Mn C_Fe, C_Si, C_Zn, C_oth are contents of copper, magnesium, manganese, iron, silicon, zinc and other components in percents in alloys, experimental determination of thickness, hardness and breakdown voltage of coating δ_B, H_B, U_B manufactured by micro-arc oxidation (MAO) on one chosen alloy, determination of values of thickness, hardness and breakdown voltage of coatings δ_i, H_i, U_i which can be obtained under the same conditions on the rest of alloys by formulas:

and determination of suitability of assessed alloys to treatment by MAO on base of obtained values.

EFFECT: upgraded accuracy of preliminary assessment of coating properties.

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