Flower-like superhydrophobic surfaces fabricated on stainless steel as a barrier against corrosion in simulated acid rain

Abstract

Functionalisation of the metal surface of low-carbon ferritic stainless steel (from hydrophilic to hydrophobic properties) was achieved by flower-like hierarchical structures on a steel substrate prepared by a low-cost immersion method. The flower-like structured hydrophobic layers on the steel substrate were obtained by immersing the samples in an ethanolic solution of stearic acid with the addition of various concentrations of expired vitamin E ((+)α-tocopherol). The stability and corrosion-inhibiting effect of the hierarchically structured (such as natural cornflower) hydrophobic layers were studied systematically during short and long immersion tests, 120 h (five days) in an acidic environment (pH = 3) using potentiodynamic measurements, electrochemical impedance spectroscopy and chronopotentiometry. The surfaces of the samples, their wettability, surface morphology and chemical composition were characterised by contact angle measurements, SEM, ATR-FTIR and EDAX. After 120 h of immersion, the inhibition efficiency of the flower-like structured hydrophobic layers on the steel substrate in the selected corrosion medium remained above 99%, and the hierarchical structure (flower-like structure) was also retained on the surface.

Keywords

kisel dež;korozija;inhibicija;nerjaveče jeklo;acid rain;corrosion;flower-like structure;inhibition;stainless steel;

Data

Language:	English
Year of publishing:	2022
Typology:	1.01 - Original Scientific Article
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	MDPI
UDC:	620.1/.2
COBISS:	126257411
ISSN:	1996-1944
Views:	0
Downloads:	4
Average score:	0 (0 votes)
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Other data

Secondary language:	Slovenian
Secondary keywords:	kisel dež;korozija;inhibicija;nerjaveče jeklo;
Type (COBISS):	Scientific work
Pages:	23 str.
Volume:	ǂVol. ǂ15
Issue:	ǂiss. ǂ20
Chronology:	13 Oct. 2022
DOI:	10.3390/ma15207104
ID:	25459697