A simple and safe method to implement corrosion experiments with 1 bar of H₂S

Abstract

A detailed description of the preparation and management of reliable and safe corrosion laboratory experiments requiring the presence of hydrogen sulphide (H 2 S) is reported in this work. The adopted method is based on a modified Kipp's apparatus allowing to produce on demand just the amount of H 2 S required for electrolyte saturation. Two benchmark corrosion cases were studied: electrochemical corrosion, monitored by means of potentiodynamic measurements, and sulphide stress corrosion cracking tests, both in H 2 S-saturated acidic aqueous chloride solutions. The sensitivity to H 2 S corrosion of a few classical materials of interest in the oil and gas sector, corrosion-resistant alloys, was then examined, proving as the presence of H 2 S leads to a denobling effect, increases the passive current density and influences significantly the time of cracking in the sulphide stress corrosion cracking tests.

Facile Surface Modification of Ultrathin Gold Nanowires Film with Hydrogen Sulfide for Improvement of Stability

“…Then it was placed in a container filled with a specific concentration of H 2 S, the change in resistance was measured in real time with the multimeter, and the concentration of H 2 S was controlled by the amount of HCl in the reaction between FeS and HCl. [ 47 ] Figure a shows the resistance of the treated AuNWs as a function of the H 2 S gas concentration; exposure of 300 ppm for 1 min did not cause a great change in the conductivity of AuNWs, but the resistance quickly decreased with the increase of concentration, only a few hundred ohms at 600 ppm for 1 min; When the treatment time was increased to 5 min, the resistance decrease more obviously, and 500 and 600 ppm both to about 20 Ω. Figure 5b shows the resistance change of 500 ppm treatment for 30 min, and the final resistance was stable at 1.2 Ω, which the conductivity was increased by 4 × 10 7 times, indicating that the 500 ppm treatment for 5 min had not reached the treatment limit.…”

Stainless Steel in Municipal Sewage—How to Recognize Favorable Corrosion Conditions

“…However, in a study by Fischer et al [26] on the effect of periodic immersion and total immersion of 304 L and 316 L steel fragments in ocean water, less corrosion was observed in the simulated tidal zone. The likely reason for this is the reduced deposition of biomass on the test fragments [27].…”

“…Also, Cheng et al [32] confirmed the effect of humidity changes (i.e., the occurrence of alternating wetting cycles) in terms of increasing pitting corrosion of 304 steel. The presence of H 2 S in the environment causes a denobling effect and an increase in the passive current density, in addition to significantly affecting cracking time and causing pitting corrosion [27,33]. In an acidic environment, H 2 S accelerates anodic dissolution in pits and cracks [34].…”

Nanometer-Thick Gold Nanowire Films with Spider-Web-Like Morphology as Transparent Conductors for Wearable Devices

“…H 2 S was provided by the reaction of FeS and HCl, and the H 2 S concentration was controlled by controlling the amount of HCl. 39 ■ CHARACTERIZATIONS Optical characterization was performed by UV−visible spectroscopy of U-2910 in the transmission mode (400−800 nm). A Fourier transform infrared spectrometer was used for infrared characterization.…”

“…H 2 S treatment and H 2 S and heat treatment used in the experiment were in the same container with a volume of 500 mL. H 2 S was provided by the reaction of FeS and HCl, and the H 2 S concentration was controlled by controlling the amount of HCl …”