ʻO nā pahu me nā mea kalapona kiʻekiʻe ua haki i nā manawa he nui, e like me nā kumu i hana ʻia me ke kila 45 #, e haki ana ma hope o ka manawa pōkole o ka hoʻohana. ʻO ka lawe ʻana i nā laʻana mai nā ʻāpana haʻihaʻi a me ka hana ʻana i ka loiloi metallographic, pinepine hiki ʻole ke ʻike i ke kumu, ʻoiai inā mamao loa ka loaʻa ʻana o kekahi mau kumu, ʻaʻole ia ke kumu maoli.
No ka hōʻoia ʻana i ka ikaika kiʻekiʻe, pono e hoʻohui ʻia ke kalapona i ke kila, kahi e hoʻoheheʻe ai nā carbide hao. Mai kahi hiʻohiʻona electrochemical, hana ka hao carbide ma ke ʻano he cathode, e hoʻolalelale ana i ka hopena anodic dissolution a puni ka substrate. ʻO ka piʻi ʻana o ka hapa nui o ka hao carbide i loko o ka microstructure e pili pū ana i nā waiwai overvoltage hydrogen haʻahaʻa o nā carbide.
ʻO ka ili o ke kila he maʻalahi ke hoʻoulu a hoʻomoʻa i ka hydrogen. Ke komo ka hydrogen atoms i loko o ke kila, hiki ke hoʻonui ʻia ka hapa nui o ka hydrogen, a ʻo ka hopena ke hoʻemi nui ʻia ke kūʻē ʻana i ka hydrogen embrittlement o ka mea.
ʻO ka hoʻohaʻahaʻa nui ʻana i ka pale ʻana i ka corrosion a me ke kūpaʻa hydrogen embrittlement o nā kila ikaika kiʻekiʻe ʻaʻole e hōʻino wale i nā waiwai o ke kila, akā ua kaupalena nui i ka hoʻohana ʻana i ke kila.
No ka laʻana, i ka wā e ʻike ʻia ai ke kila kaʻa i nā wahi ʻino like ʻole e like me ka chloride, ma lalo o ka hana o ke koʻikoʻi, ʻo ke ʻano o ka pohā ʻino ʻino (SCC) e hiki mai ana e lilo i mea hoʻoweliweli koʻikoʻi i ka palekana o ke kino o ke kaʻa.
ʻOi aku ka kiʻekiʻe o ke kalapona, ʻoi aku ka haʻahaʻa o ka diffusion coefficient a ʻoi aku ka kiʻekiʻe o ka hydrogen solubility. Ua ʻōlelo ʻo Scholar Chan i kekahi manawa e pili ana nā hemahema o ka lattice e like me ka precipitates (ma ke ʻano he mau wahi pahele no nā atom hydrogen), hiki, a me nā pores ke kūlike i ka ʻike kalapona. ʻO ka hoʻonui ʻana o ka maʻiʻo kalapona e keʻakeʻa i ka hoʻoheheʻe hydrogen, no laila ua haʻahaʻa hoʻi ka coefficient diffusion hydrogen.
Ma muli o ka like o ka maʻiʻo kalapona i ka hoʻoheheʻe hydrogen, ʻoi aku ka nui o ka hapa nui o nā carbide ma ke ʻano he hydrogen atom traps, ʻoi aku ka liʻiliʻi o ka coefficient diffusion hydrogen i loko o ke kila, ʻoi aku ka nui o ka hydrogen solubility, a ʻo ka hydrogen solubility pū kekahi ʻike e pili ana i ka hydrogen diffusible. no laila, ʻoi aku ka kiʻekiʻe loa o ka hiki ʻana o ka hydrogen embrittlement. Me ka piʻi ʻana o ka ʻike kalapona, e emi ana ka diffusion coefficient o nā hydrogen atoms a piʻi aʻe ka ʻili o ka hydrogen ma muli o ka emi ʻana o ka overvoltage hydrogen ma ka ʻili kila.
