Plasma Power Impact on Electrochemical Performance of Low Carbon Steel Coated by Plasma Thin Teos Films

Abstract

Electrochemical properties of thin silicon oxy carbide films were investigated as anticorrosive coatings. The film was deposited on low carbon steel substrate by radio frequency capacitive coupled plasma technique using tetraethyl ortho silicate (TEOS) as a precursor and Ar was used as a carrier gas in dependence on the applied power. The chemical composition and morphological of the deposited films were examined by energydispersive X-ray spectroscopy (EDX) coupled with scanning electron microscopy (SEM). The SEM results confirm a pinhole-free layer of oxy carbide was formed on the steel surface after plasma treatment. The corrosion resistance of the coatings was analyzed by potentiodynamic polarization and electrochemical spectroscopy (EIS) in 3.5% NaCl solution at room temperature. The electrochemical results show remarkable corrosion resistance enhancement after plasma treatments. The corrosion current (icorr) is significantly reduced from 12 µA/cm 2 for the blank sample to 1 and 0.3 µA/cm 2 for treated samples at 50, and 100 W, respectively. A marked increase of the protective properties was detected by 100 W sample with protective efficiency more than 98 % at room temperature.

Study of the Corrosion of Nickel–Chromium Alloy in an Acidic Solution Protected by Nickel Nanoparticles

“…Table shows the results of this calculation. It is common knowledge that samples having a higher positive corrosion potential are more inert. , It is clear from Table that the blank shows an E corr value of −486.0 mV (vs saturated calomel electrode (SCE)), while the Ni coatings shift to a more positive E corr . The high E corr values of −135.0 mV (vs SCE) and −262.0 mV (vs SCE) are obtained for the Ni coatings prepared at pH = 1 and 6, respectively, indicating their resistance to corrosion.…”

“… 11 − 13 Anions such as sulfates, nitrates, chlorides, and thiosulfates cause corrosion damage to iron alloys in the industrial environment, significantly lowering their operational life. 14 − 16 Among the several corrosion protection techniques available, the most successful is the application of inhibitors and coatings 17 − 19 Organic corrosion inhibitors, on the other hand, might be harmful to the environment, producing cytotoxic and mutagenic damage to biological systems. 20 Surface coating with micro-nano structures can provide good corrosion protection for metallic matrices.…”

“…As a result, maintaining the corrosion resistance of nickel alloys is a critical and time-consuming work duty . Numerous strategies are used to protect the metal surface against destructive attacks (anticorrosive approach); nevertheless, corrosion inhibitors are considered viable to protect the metal surface, especially in an acidic medium. − Anions such as sulfates, nitrates, chlorides, and thiosulfates cause corrosion damage to iron alloys in the industrial environment, significantly lowering their operational life. − Among the several corrosion protection techniques available, the most successful is the application of inhibitors and coatings − Organic corrosion inhibitors, on the other hand, might be harmful to the environment, producing cytotoxic and mutagenic damage to biological systems . Surface coating with micro-nano structures can provide good corrosion protection for metallic matrices .…”

Effective corrosion inhibition of mild steel in hydrochloric acid by newly synthesized Schiff base nano Co(ii) and Cr(iii) complexes: spectral, thermal, electrochemical and DFT (FMO, NBO) studies

“…2 The losses cost could be estimated to billions of dollars every year. 3 Several methods and techniques were developed to resist the corrosion of metals like deposition and coating, [4][5][6][7] however the application of corrosion inhibitors still one of the most suitable and effective methods. 8,9 Corrosion inhibitors are characterized by high degree of adsorption ability onto metallic surface.…”

Effect of Plasma Oxidation Treatment on Production of a SiOx/SiOxCyHz Bilayer to Protect Carbon Steel Against Corrosion

“…Gangan et al 31 deposited silicon oxycarbide films on low carbon steel using PECVD with tetraethylorthosilicate (TEOS) as the precursor and argon as the carrier gas. The authors investigated the influence of plasma excitation power on the film corrosion protection properties using potentiodynamic polarization and EIS in 3.5% w/w NaCl solution.…”