Dear Dr. Weronika Sadurska ,

I suggest you to have a look at the following document where you might find an alternative:

-Anodizing

Revised by Milton F. Stevenson, Jr., Anoplate Corporation

ASM Handbook, Volume 5: Surface EngineeringC.M. Cotell, J.A. Sprague, and F.A. Smidt, Jr., editors, p 482-493DOI: 10.1361/asmhba0001281 (1994)

Available at: https://materialsdata.nist.gov/bitstream/handle/11115/221/Anodizing.pdf?sequence=1

My best regards, Pierluigi Traverso.

dear Weronika Sadurska ;

I advise you to use an acidic solution composed of 0.40M sulfuric acid, 0.53M of tartaric acid, and 0.25M sodium molybdate a Temperature of 20 °C and pH between 1 and 1,2. for a sample of 40mm width, 50mm long, and 5mm high the anodizing can be carried out under a potential difference of 14V immersed for about one minute. For more details can pass through the following references;

• Article Effect of the layer of anodized 7075-T6 aluminium corrosion properties

• https://iopscience.iop.org/article/10.1088/1742-6596/786/1/012032/pdf
• Rubio M N 2007, Influence of molybdate species on the tartaric acid/sulphuric acid anodic films grown on AA2024 T3 aerospace alloy Rev. Corrosion Science 51(9) 2034–2038 (PDF) Effect of the layer of anodized 7075-T6 aluminium corrosion properties. Available from: https://www.researchgate.net/publication/312871504_Effect_of_the_layer_of_anodized_7075-T6_aluminium_corrosion_properties [accessed Jan 21 2021].

Dear Dr. Weronika Sadurska ,

I suggest you to have a look at the following document where you might find an alternative:

-Anodizing

Revised by Milton F. Stevenson, Jr., Anoplate Corporation

ASM Handbook, Volume 5: Surface EngineeringC.M. Cotell, J.A. Sprague, and F.A. Smidt, Jr., editors, p 482-493DOI: 10.1361/asmhba0001281 (1994)

Available at: https://materialsdata.nist.gov/bitstream/handle/11115/221/Anodizing.pdf?sequence=1

My best regards, Pierluigi Traverso.