Study of Electrochemical Behavior, Hydrogen Permeation and Diffusion in Pipeline Steel

Abstract

The pipeline steels which are used for transportation of natural gas and crude oil suffer from hydrogen damage at their internal as well as external surfaces. The internal surfaces of pipelines are generally affected due to hydrogen induced cracking and the external surfaces due to the soil environmental conditions which cause stress corrosion cracking. In the present investigation, the electrochemical corrosion behavior of X70 pipeline steel was studied in sour environment and near neutral soil environment. To assess the mechanism of hydrogen damage in steel, electrochemical hydrogen charging and permeation techniques were used to characterize the hydrogen distribution, trapping and its diffusion in X70 pipeline steel. It has been found that corrosion behavior of pipeline steel in the sour environment is higher than the near neutral soil solution. From the hydrogen permeation study it is established that the hydrogen permeation rate increases with the square root of the charging current density, and the increase of hydrogen flux is directly proportional to the subsurface hydrogen concentration.

Hydrogen economy in India: A status review

“…• Where users are co-located with production assets (Bhagavathy & Thakur, 2022;Bhattacharyya, 2019;Gupta et al, 2016). • A production hub and grid model is similar to the current natural gas infrastructure set-up (Dey et al, 2021;Jayasinghearachchi et al, 2010).…”

“…Existing literature suggests that large‐scale hydrogen storage and transportation are feasible in liquid hydrogen, liquid organic hydrogen carriers (LOHC), ammonia, and metal hydrides (Andersson & Grönkvist, 2019; Bhagavathy & Thakur, 2022; Bhattacharyya, 2019). India can draw lessons from Australia in this respect, where the export of liquid hydrogen (Milani et al, 2020) and ammonia as a hydrogen carrier is under demonstration (Dey et al, 2021; Jayasinghearachchi et al, 2010).…”

Study of Diffusible Behavior of Hydrogen in First Generation Advanced High Strength Steels

“…Electrochemical permeation study using Devanathan and Stachurski (DS) cell is an effective way to understand H permeation behavior with good sensitivity by continuously recording the diffusive flow of hydrogen with time [19,[23][24][25]. H-permeation depends on its solubility, segregation, and trapping tendency of microstructures.…”