Imivalo enomxholo ophezulu wekhabhoni yophukile amaxesha amaninzi, njengeeshafu ezenziwe ngentsimbi ye-45 #, eya kuphuka emva kwexesha elifutshane lokusetyenziswa. Ukuthatha iisampulu kwiindawo eziqhekekileyo kunye nokwenza uhlalutyo lwe-metallographic, kaninzi akunakwenzeka ukufumana isizathu, nokuba kukude ukufumana izizathu, akusona sizathu.
Ukuqinisekisa amandla aphezulu, ikhabhoni kufuneka yongezwe kwintsimbi, apho i-iron carbides ihamba khona. Ukusuka kwindawo yokujonga i-electrochemical, i-carbide yensimbi isebenza njenge-cathode, ikhawuleza i-anodic dissolution reaction ejikeleze i-substrate. Ukunyuka kweqhekeza le-volume ye-iron carbides ngaphakathi kwe-microstructure kubangelwa ne-low hydrogen overvoltage properties of carbides.
Umphezulu wentsimbi kulula ukuvelisa kunye nokufunxa i-hydrogen. Xa iiathom ze-hydrogen zingena kwintsimbi, iqhekeza le-hydrogen linokunyuka, kwaye ekugqibeleni ukuchasana kwe-hydrogen embrittlement yezinto kuyancipha kakhulu.
Ukunciphisa okuphawulekayo kokuchasana kwe-corrosion kunye ne-hydrogen embrittlement resistance of high-high-street steels ayigcini nje ukulimaza iipropati zetsimbi, kodwa kunciphisa kakhulu ukusetyenziswa kwentsimbi.
Ngokomzekelo, xa intsimbi yemoto ibonakaliswe kwiindawo ezonakalisayo ezahlukeneyo ezifana nekloridi, phantsi kwesenzo soxinzelelo, i-phenomenon of stress corrosion cracking (SCC) enokuthi yenzeke iya kubangela ingozi enkulu kukhuseleko lomzimba wemoto.
Okukhona uphezulu umxholo wekhabhoni, kokukhona usezantsi i-hydrogen diffusion coefficient kwaye iphezulu i-hydrogen solubility. Umfundi uChan wakhe wacebisa ukuba iziphene ezahlukeneyo zelattice ezifana ne-precipitates (njengeendawo zomgibe weeathom ze-hydrogen), ezinokubakho, kunye neepores zihambelana nomxholo wekhabhoni. Ukunyuka komxholo wekhabhoni kuya kuthintela ukusasazwa kwe-hydrogen, ngoko ke i-hydrogen diffusion coefficient nayo iphantsi.
Ekubeni umxholo wekhabhoni ulingana ne-hydrogen solubility, ubukhulu beqhekeza le-carbides njengemigibe ye-athom ye-hydrogen, i-coefficient ye-hydrogen diffusion encinci ngaphakathi kwentsimbi, i-solubility enkulu ye-hydrogen, kunye ne-solubility ye-hydrogen nayo iqulethe ulwazi malunga ne-hydrogen edibeneyo, ngoko ukuchaphazeleka kweHydrogen embrittlement yeyona iphezulu. Ngokunyuka komxholo wekhabhoni, i-coefficient ye-diffusion ye-athomu ye-hydrogen iyancipha kwaye i-surface concentration ye-hydrogen iyanda, okubangelwa ukuhla kwe-hydrogen overvoltage kumphezulu wensimbi.
