Disbonding of Austenitic Stainless Steel Cladding Following High-Temperature Hydrogen Service in Hydro Processing Applications

EasyChair Preprint 6422

Abstract

The purpose of the study is to develop a methodology for determining the concentration of hydrogen in a bimetallic compound. Hydronization and degassing of metal samples with a cladded anti-corrosive layer were experimentally studied. Hydronization of the samples was performed in a special chamber with the possibility of recording operating parameters that simulated the full cycle of the oil hydrocracking reactor, according to the requirements of the ASTM G146-01 standard. Cracking control was carried out using ultrasonic testing and acoustic emission signals. The moment of disbonding formation was established. The scientific novelty lies in the possibility of using numerical modeling by the finite element method for the redistribution of hydrogen in the alloying zone for a cylindrical bimetallic sample with a protective cladding due to non-stationary thermal effects. It was established that heat shifts change the diffusion of hydrogen in bimetal, creating non-equilibrium hydrogen oversaturation of local volumes of the fusion zone. The reliability of surfacing depends, in particular, on the kinetics of thermal processes. The critical value of hydrogen concentration was determined.

Keyphrases: Bimetallic fusion, Disbonding cladding, Hydrogen concentration

@booklet{EasyChair:6422,
  author    = {Yaroslav Ivanytskyi and Oksana Hembara and Mykola Hvozdyuk and Olha Chepil and Mykhailo Hrynenko},
  title     = {Disbonding of Austenitic Stainless Steel Cladding Following High-Temperature Hydrogen Service in Hydro Processing Applications},
  howpublished = {EasyChair Preprint 6422},
  year      = {EasyChair, 2021}}