Aim of the work is to investigate by using acoustic emission technique (AE) the hydrogen assisted Stress Corrosion Cracking (SCC) phenomena, in a martensitic stainless steel. In particular a study based on time domain approach was carried out in order to analyse the corrosion phenomena by using data variables evolution. An appropriate set of variables was presented, some of them directly related to the acoustic phenomena, such as Amplitude, Duration and other descriptors of the AE waveform, while others have been derived from them, such as b-value and Ib-value, that are descriptors about the time domain distribution of the AE event energy. Tests were carried out on a X12Cr13 martensitic stainless steel, according to NACE TM 0177 standard, using a modified sour corrosive environment (5% NaCl, 2.5% Acetic Acid and 10 -2 M Na 2 S 2 O 3 ).
MONITORING OF HYDROGEN ASSISTED SCC ON MARTENSITIC STAINLESS STEEL BY ACOUSTIC EMISSION TECHNIQUE
Luigi CALABRESE;Massimiliano GALEANO;Edoardo PROVERBIO;
2016-01-01
Abstract
Aim of the work is to investigate by using acoustic emission technique (AE) the hydrogen assisted Stress Corrosion Cracking (SCC) phenomena, in a martensitic stainless steel. In particular a study based on time domain approach was carried out in order to analyse the corrosion phenomena by using data variables evolution. An appropriate set of variables was presented, some of them directly related to the acoustic phenomena, such as Amplitude, Duration and other descriptors of the AE waveform, while others have been derived from them, such as b-value and Ib-value, that are descriptors about the time domain distribution of the AE event energy. Tests were carried out on a X12Cr13 martensitic stainless steel, according to NACE TM 0177 standard, using a modified sour corrosive environment (5% NaCl, 2.5% Acetic Acid and 10 -2 M Na 2 S 2 O 3 ).Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.