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

Abstract

This study uses nickel nanoparticles coated on the nickel–chromium (Ni–Cr) alloy by the electrodeposition technique to protect the alloy against corrosion. An open-circuit potential and potentiodynamic and linear polarization resistance in a 1 M H 2 SO 4 solution saturated with carbon dioxide were used to study the anticorrosion performance of nanoparticle coatings. When coated with nanomaterials, the corrosion rate of Ni–Cr alloy was lower than when it was bare, and the potential for corrosion increased from −0.433 V for uncoated Ni–Cr alloy to −0.103 V when the electrodes were exposed to saturated calomel. Electrochemical experiments show that nickel-coated Ni–Cr alloy corrosion in sulfuric acid media has high protective characteristics, with an efficiency of 83.69% at 0.165 mA/cm 2 current density when pH = 1 is used. As demonstrated by the results of this research, the nickel–chromium alloy can be protected from corrosion in acidic media by a low-acidity bath coating layer. Surface morphologies have shown that coatings at different acidic scales may be able to resist an acid attack because of their excellent adherence to the nickel–chromium alloy surface. Measures for determining and studying the composition of the alloy surface’s protective covering were improved using X-ray diffraction (XRD).

Corrosion mitigation for steel in acid environment using novel p-phenylenediamine and benzidine coumarin derivatives: synthesis, electrochemical, computational and SRB biological resistivity

“…The adjusted frequency values for electrochemical frequency modulation (EFM) were 2 Hz and 5 Hz at 25 °C. The inhibition efficiency was calculated for EFM, EIS and PDP from the following equations: 42–44 where, and i corr are current density for corrosion electrolytes without and with inhibitors, respectively.where, R ct (i) and R ct (0) are the charge transfer resistance with and without inhibitor, respectively, using 1.0 M HCl electrolyte medium.…”

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

“…Elemental analysis was carried out using a PerkinElmer 2400 CHN elemental analyzer. With a Gouy balance, a Sherwood scientic magnetic scale, and H g [-Co(CSN) 4 ] as the signing, the magnetic susceptibilities of the powdered materials were tested at ambient temperature. CONSORT K410 was used to analyze the molar conductance of 1 × 10 −3 M solutions of the ligands and their complexes in ethanol.…”

“…The band at 350 nm (28 571 cm −1 ) could be assigned to n-p* transition. 37 Moreover, the [Co(L) 2 (H 2 O) 2 ]Cl 2 $H 2 O complex electronic spectrum shows two wide bands at 495 nm (21 052 cm −1 ) and 611 nm (16 366 cm −1 ) due to 4 T 1g (F) / 4 T 1g (P) (n 3 ) and 4 T 1g (F) / 4 A 2g (F) (n 2 ) transitions, respectively in an octahedral high-spin d 7 (ref. 39) (Fig.…”

“…The calculated values corresponding to the ligand region parameters Dq, B, and b are 909 cm −1 , 957 cm −1 , and 0.87 cm −1 , respectively revealing that b is lower than unity which demonstrates the covalence of the metal-ligand bond. 39,40 In addition, the two absorption bands at 499 and 613 nm in the electronic spectrum of the Cr(III) complex due to 4 A 2g (F) / 4 T 2g (F) (n 1 ) and 4 A 2g (F) / 4 T 1g (F) (n 2 ) transitions, respectively beside the calculated parameters: Dq (1525 cm −1 ), B (635 cm −1 ) and b (0.58) prove the octahedral environment around the Cr(III) ion. 40 3.1.5 Optical band gap energy.…”

“…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.…”