Products tagged with 'electrochemical charging'

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A comparison among different electrochemical hydrogen charging methods tested on low alloy steels

Product Number: 51323-18866-SG

Author: Luca Paterlini, Luca Casanova, Giorgio Re, Marco Ormellese, Fabio Bolzoni

Publication Date: 2023

$20.00

Atomic hydrogen can enter metallic microstructures from deposition processes like Cr plating or phosphatizing, chemical and electrochemical pickling treatments, during welding operations if the humidity of consumables is too high, by cathodic processes resulting from corrosion phenomena or contact with high pressure gaseous hydrogen. According to different chemical-physical mechanisms, atomic hydrogen can enter the metallic structure resulting in damages of various forms, such as HIC (hydrogen induced cracking), SOHIC (stress oriented HIC), delayed fracture and hydrogen embrittlement (HE).

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Can Electrochemical Charging Replace Hydrogen Gas Charging During Hydrogen Embrittlement Testing?

Product Number: 51324-20712-SG

Author: Erik Koren; Roy Johnsen; Dong Wang; Cataslina H.M. Hagen; Anette B. Hagen; Bård Nyhus; Antonio Alvaro; Hisao Matsunaga

Publication Date: 2024

$40.00

This paper presents the output from a study with the aim to correlate hydrogen gas charging and electrochemical charging for a X65 pipeline steel. The hydrogen uptake and diffusivity were evaluated via the permeation technique by employing both hydrogen gas charging and electrochemical charging. The effective diffusion coefficient, Deff, was determined by partial transients. The sub-surface hydrogen concentration, C0R, was then employed to determine the equivalent hydrogen pressure, pH2eq, of electrochemical charging conditions. In parallel, a permeation cell consisting of two membranes with thickness 6 mm welded together with a narrow gap in between was built. This unit was exposed to equal cathodic polarization conditions as the electrochemical permeation cell. The equilibrium pressure in the gap was measured and compared to the calculated hydrogen pressure from the gas permeation test with good correlation. Finally, an initial evaluation through toughness tests with the same X65 material executed in i) hydrogen gas and ii) electrolytic charging at equivalent hydrogen concentrations, gave promising results concerning the correctness of the correlation between the two hydrogen sources.

Products tagged with 'electrochemical charging'

A comparison among different electrochemical hydrogen charging methods tested on low alloy steels

Can Electrochemical Charging Replace Hydrogen Gas Charging During Hydrogen Embrittlement Testing?

Association for Materials Protection and Performance