INFLUENCE OF THE PRESENCE OF HYDROGEN SULPHIDE ON THE CONFINED FAILURE STRENGTH IN HYDROGEN OF LOW-ALLOY STEELS WITH HIGH MECHANICAL PROPERTIES: CONSEQUENCES FOR TEST METHODS

INFLUENCE DE LA PRESENCE DE H2S SUR LA RESISTANCE A LA RUPTURE SOUS CONTRAINTE DANS L'HYDROGENE D'ACIERS FAIBLEMENT ALLIES A CARACTERISTIQUES MECANIQUES ELEVEES : CONSEQUENCES POUR LES METHODES D'ESSAIS

This paper was presented at a seminar organised by the association of anticorrosion engineers, September 28 and 29, Paris. Crack testing was carried out with notched specimens under static stress to study the mechanics of ultimate tensile strength. It was shown that the addition of 5% by volume of hydrogen sulphide to pure hydrogen increases the rate of propagation of cracks in two low-alloy steels with high mechanical properties by a factor of 10 to 10-3. A Ni-Cr-Mo steel and a Cr-Mo steel were used. On the other hand the threshold of non-propagation of cracking is near to that obtained in pure hydrogen. The comparison of the present results obtained by operating in an atmosphere of hydrogen + 5% hydrogen sulphide and those obtained earlier in other environments (pure gaseous hydrogen and aqueous chloride solutions) show that the technique of carrying out crack tests in a mixture of hydrogen and hydrogen sulphide allows the resistance to hydrogen embrittlement of the above steels to be assessed simply, rapidly and precisely. (TRRL)

  • Corporate Authors:

    Revue de Metallurgie

    14 rue Boissiere
    Paris 16e,   France 
  • Authors:
    • Charbonnier, J C
    • Margot-marette, H
  • Publication Date: 1979-5

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00331399
  • Record Type: Publication
  • Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
  • Files: ITRD, TRIS
  • Created Date: Aug 15 1981 12:00AM