STEARIC ACID MODIFIED ALUMINUM ALLOY 5556

1 SPIRIDONOVA Anastasiya
Co-authors:
1 ABRASHOV Aleksey 1 GRIGORYAN Nelya 1 BESSONOVA Kristina 1 VAGRAMYAN Tigran 1 TOLMACHYOV Yan
Institution:
1 MUCTR - D.Mendeleev University of Chemical Technology of Russia, Moscow, Russia, RU, anmalenkova1@gmail.com
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
1158-1162
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
36 views / 14 downloads
Abstract

One of the methods of protection of metal surfaces from an aggressive environment is the formation of continuous coating on their surfaces with water-repelling properties and a self-cleaning ability, which give the material superhydrophobic properties and also protect them from contamination.A solution for hydrophobization of aluminum alloy 5556 in a solution containing dimethyl sulfoxide and water in a ration of 7:1 and also stearic acid in the amount of 0.01 mol/L was developed.It was determined that the newly-formed coating in this solution is characterized by a contact angle of θс = 151°. The protective ability of coatings determined by the drop method as the time until the appearance of corrosion product under the drop of Akimov solution amounts to 125 s.Corrosion tests of AA 5556 speciments with hydrophobized surface were conducted (ASTM B117) in a salt fog chamber in the developed solution. The tests have shown that the developed coating withstands 140 h in salt fog conditions (5 % NaCl) until the appearance of corrosion hotbeds on the base, while the unprocessed specimen of aluminium alloy started corroding after 24 h.

Keywords: Corrosion protection, surface treatment, aluminum, hydrophobization, stearic acid
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