The corrosion resistance of Cr-containing alloy parts made by additive manufacturing can be significantly improved a post-treatment gas-phase-based infusion concentrated interstitial solute (carbon and nitrogen). We demonstrate this universal approach for the example low-temperature nitrocarburization solid-reagent pyrolysis applied to Alloy 22 (UNS N06022) laser powderbed fusion. show that imp...

This work aims at proposing a novel approach to classify acoustic emission (AE) signals deriving from corrosion damage, even if embedded into a noisy environment. Tests involving noise and crevice corrosion are conducted, by preprocessing the waveforms including wavelet denoising and extracting a rich set of features as input of the Random Forest algorithm. To this end, a software called RF-CAM...

Hydrochloric acid (HCl) is an important mineral acid with many uses, including the pickling of steel, acid treatment of oil wells and chemical cleaning and processing. This acid is extremely corrosive and its aggressiveness can change drastically depending on its concentration, the temperature and contamination by oxidizing impurities. One of the most commonly encountered oxidizing impurities i...

Environment safety measurements have resulted in use of peroxide as bleaching chemical in place of chlorine and chlorine dioxide. Concentration and composition of chemicals affects corrosion aspects, the suitability of existing plant metallurgy and materials of construction of bleach plants. Accordingly long term immersion and electrochemical corrosion tests were conducted on stainless steel 30...

PURPOSE The aim of the presented research was to find a combination of surface modification methods of implants made of the Ti-6Al-4V ELI alloy, that lead to formation of effective barrier for metallic ions that may infiltrate into solution. METHODS To this end, the following tests were carried out: roughness measurement, the voltamperometric tests (potentiodynamic and potentiostatic), and th...

Corrosion behavior of epoxy-coated rebar with different size microdefects in uncarbonated/carbonated simulated pore solution (U/CSPS) seawater concrete was investigated. Specimens both solutions underwent two stages corrosion, according to the electrochemical impedance spectroscopy (EIS) response. The initial stage extension corrosion. second dominated by diffusion process, due corrosion produc...

There is increasing global awareness of adverse reactions to metal debris and elevated serum metal ion concentrations following the use of second generation metal-on-metal total hip arthroplasties. The high incidence of these complications can be largely attributed to corrosion at the head-neck interface. Severe corrosion of the taper is identified most commonly in association with larger diame...