Comparison studies of the protective properties of silane/polyrhodanine and polyrhodanine/silane bilayer coatings applied on stainless steel

Abstract

Purpose The purpose of this paper is to evaluate and compare the protective, anticorrosion properties of silane- and polyrhodanine-based bilayer coatings pRh/IBTES and IBTES/pRh on an X20Cr13 stainless steel substrate. Design/methodology/approach IBTES/pRh and pRh/IBTES have been coated using the dip-coating method and the cyclic voltammetry technique. The electrochemical measurements have been used to assess the anticorrosion properties of the resulting bilayer coatings. Morphological and chemical characterizations have been performed using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Findings The results clearly show that the combination of both the deposits of polyrhodanine and silane yields a more protective structure that affords better protection against corrosion with time. The best barrier properties are achieved by the substrates coated with polyrhodanine film upon which silane is subsequently adsorbed – the pRh/IBTES bilayer coating. Originality/value The paper reveals that the procedure of modification of silane films with polyrhodanine had a marked effect on the anti-corrosive performance of the obtained two types of bilayers coatings (pRh/IBTES, IBTES/pRh) applied on a stainless steel surface. The coating where polyrhodanine was first electrodeposited on the steel surface and then the silane layer adsorbed (pRh/IBTES) achieved the best protective properties.

Polyrhodanine-based nanomaterials for biomedical applications: A review

“…PR possesses distinctive properties, which are favourable in various applications, such as corrosion inhibition [ 42 ], lithium batteries [ 43 ], and heavy metals adsorption [ 44 ]. This review focus on PR's applications in different biological and medical fields, including antibacterial, antiviral, antiparasitic, and anticancer activities.…”

Methods of Modifying Anticorrosive Protective Properties of Silane Films

“…Moreover, the combination of HA and silane can provide functional groups for further immobilization of essential biological components to facilitate the development of biodegradable metallic implants [72,73]. Another possible way to improve the corrosion protection afforded by silane layers is to use systems composed of silane and conducting polymers such as polypyrrole [74,75] or polyrhodanine [76] on aluminium, titanium, and stainless steel substrates, respectively. An electrochemical study and corrosion tests on samples coated with such bilayers coatings revealed that combination of both deposits yields a more protective structure with better corrosion resistance.…”

Effect of silane on corrosion resistance and aerodynamic performance of 6063 Al alloy inertial air–water separator

“…Silane treatment has become a new surface treatment technology owing to its simple operation, low cost, short treatment time and environmental friendliness (Owczarek, 2018; Zhu et al , 2021). The formation of a silane film on a metal surface is mainly achieved by hydrolysis and condensation of the silane coupling agent (Calabrese et al , 2018; Xing et al , 2019).…”