The role of the passive film on galvanic corrosion of Ti60-H62 galvanic coupling is studied. The conventional and in situ electrochemical results indicate that the galvanic corrosion is ignorable under the large potential difference. The results of polarization curves and M-S plots prove that low donor density of the passive film determines the slow electron charge transfer rate, resulting in the slow oxygen reduction rate at the metal/film interface, which plays an essential role in ignorable galvanic corrosion.

The aim of this paper was to assess the achievable mechanical properties and corrosion resistance of UNS N06625 forged bars in age-hardened condition with respect to the annealed one, to understand the feasibility of this not conventional heat treatment for the industrial application.

A remarkable improvement in the pitting corrosion resistance of 304 stainless steel was attempted using a novel duplex passivation treatment method. First, chemical passivation in nitric acid followed electrochemical passivation via potential polarization of step cycling in sodium nitrate electrolyte. The probable reason for the improvement on pitting resistance is discussed in detail.

KorroPad tests, electrochemical potentiodynamic reactivation test based on a single loop test, and surface analytical methods were performed to investigate the influence of individual grinding parameters on the corrosion resistance of the austenitic stainless steel grade X5CrNi18-10. The results show a significant influence of the abrasive belt type. Granulate abrasive belts generated surfaces with a higher susceptibility to corrosion than single-coated grain.

The effects of different retrogression times and temperatures on the microstructure, electrical conductivity, exfoliation corrosion (EXCO), and hardness of the 7050 aluminium alloy were compared with the T6 and T7451 condition. The results show that retrogression and reaging (RRA) times and temperatures have significant effects on AA7050 EXCO.

The effect of Sr additions in the form of Mg–Sr master alloys on the mechanical properties, corrosive nature, and microstructure of Al–9.2Mg–0.7Mn alloys is evaluated. There will be a new phase which might be (Al, Mg)₁₇Sr₂ formed in the as-cast microstructure. The Al–9.2Mg–0.7Mn alloy with 0.2 wt% addition exhibits the best combined mechanical properties and intergranular corrosion resistance.

Immersion corrosion tests on samples with sharp edges of AlSi10Mg alloy produced by additive manufacturing allowed indentifying a deleterious corrosion mechanism in as-built condition. Electrochemical tests were not adequate to reveal this behavior. Due to the microstructural evolution after T6 heat treatment, samples exhibited a lower mass loss in heat-treated conditions than in as-built condition.

Determination of corrosion behavior of AA5083 in brackish and seawater has been investigated and compared at 18, 25, and at 30°C. Obtained results have shown that an increase in temperature leads to an increase in corrosion activity of AA5083 in both electrolytes, while microscopic examination reveals that the dominant type of corrosion is pitting.

A continuously fed biofilm simulating the water injection process was operated to investigate the influence of biofilm development on microbially influenced corrosion (MIC) behavior in the early phase of corrosion development. The development of the corrosion product film and biofilm was monitored for 5 months with electrochemical impedance spectroscopy, linear polarization resistance, scanning electron microscopy, 3D optical profiling, and direct weight measurement. MIC development was found to comprise three phases: initialization, transition, and stabilization.

We defined a corrosion patch as a cluster of individual defects within or less than the one-wall-thickness distance of each other and conducted a morphometric study on patches from several deteriorated cast iron pipes. It was found that the size parameters, viz., the patch length, width, area, and volume potentially attain steady-state progression over long-term deterioration and are consistent with current understanding in underground corrosion.

The corrosion behavior and mechanism of iron-oxidizing bacteria (IOB) on X65 steel in seawater are investigated. The results reveal that IOB increases the corrosion damage degree of steel. Micrometer-scale pittings are observed in the presence of the bacterial medium. The synergies in corrosion between the metal surface, abiotic corrosion products, and bacterial cells, and the pitting corrosion mechanism of X65 steel are discussed.

Scanning electron micrographs were used to evaluate the conditions of the mild steel surface in contact with a sulfuric acid solution in the absence and presence of metoclopramide. The images show that surface corrosion of alloy decreased noticeably in the presence of metoclopramide tablet. There are less pits and cracks observed in the inhibited surface.

The influence of Cu on the nanostructure of Fe₃O₄ particles was investigated through a detailed analysis of the characteristics of the artificially synthesized Fe₃O₄ particles formed with Cu²⁺. X-ray absorption fine structure (XAFS) analysis showed that Cu is substituted for octahedral Fe in Fe₃O₄. The first-principle calculation showed that lattice strain resulted around the substituted Cu. It is suggested that this lattice strain around substituted Cu inhibited the lattice growth of Fe₃O₄ particles.

The corrosion behavior of 4H-SiC in lead-bismuth (Pb-Bi) eutectic (LBE) at 550°C was investigated. To clarify the effect of irradiation damage on corrosion, samples with and without Si ⁵⁺ ion irradiation were contrastively evaluated. The main results show that dissolution corrosion occurs in both unirradiated and irradiated samples, while the irradiation damage can accelerate the corrosion rate.

The development and characterization of a versatile smart coating containing an encapsulated inhibitor is described. This includes the synthesis and characterization of hollow spherical nanocapsules with diameters ranging from 180 to 200 nm. Electrochemical Impedance Spectroscopy highlighted a negative effect of the capsules’ addition to the polyurethane network, affecting the coating's barrier properties.

It is very important to improve the stability of power transmission systems. High voltage disconnectors used outdoors will be corroded in the atmosphere, but the influence of electric current on the corrosion behavior has not been well studied yet. In this paper, the effect of electric current on corrosion behavior is studied by means of a self-made device.

A novel corrosion inhibitor, hexamethylenetetramine (HMTA) quaternary ammonium salt, is synthesized using HMTA and bromohexane as main reactants. The inhibitive action of HQAS on QT800-2 steel in hydrochloric acid medium is evaluated by weight-loss method, electrochemical method, and quantum chemical calculation.