The range of Critical Pitting Temperature (CPT) for five different stainless steels is measured to determine whether it wide or narrow. impact bulk solution composition and surface passivation on CPT was also in order evaluate the relative importance pit initiation propagation CPT. results study revealed that can be within a narrow (±1.3 °C) regardless alloy composition. It shown experimental e...

Nine grades of steel from different European steelmakers, namely 304L, 316L, and 904L, were evaluated. The austenitic steels studied are used in the manufacture watch straps. evaluations have been carried out accordance with ASTM standards which specifically concern forms corrosion, pitting (G48-11, FeCl3), intergranular (A262-15, Strauss method) test Tuccillo–Nielsen test. polarization electro...

A comparative study on the mechanical properties, scratch resistance, and localized corrosion (pitting crevice) of plasma-nitrided Inconel alloy 718 (UNS NO7718: IN 718) was carried out. Thermochemical treatment performed at low temperatures (400 450 °C) for 4 h. The formed layers with thicknesses 7.17 ± 0.89 µm 7.96 0.48 (450 °C). XRD nanohardness analyses indicated formation a hard layer comp...

Previous research has indicated a qualitative resemblance between the current distribution along actively corroding crevice walls and currents measured in corresponding anodic polarization plots. Using detailed measurements of the potential gradient along the crevice, a semi-quantitative current distribution was calculated for the crevice wall using a double numerical differentiation method. Th...

For reliability and safety issues of injection wells, corrosion resistance materials used needs to be determined. Herein, representative low-cost materials, including carbon steel X70/1.8977 low alloyed 1.7225, were embedded in mortar mimic the realistic casing-mortar interface. Two types cement investigated: (1) Dyckerhoff Variodur commercial Portland cement, representing a highly acidic resis...