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ʻO ke kila 20MnTiB ka mea nui loa i hoʻohana nui ʻia no nā alahaka hale kila ma koʻu ʻāina, a he mea nui kāna hana i ka hana palekana o nā alahaka. ʻO Chongqing. Ua aʻo ʻia nā hopena o ka wela, ka waiwai pH a me ka hoʻohālikelike ʻana i ka hopena corrosion i ka hana ʻino koʻikoʻi o 20MnTiB ikaika kiʻekiʻe.
ʻO ke kila 20MnTiB ka mea nui i hoʻohana nui ʻia no nā alahaka hoʻolālā kila ma koʻu ʻāina, a he mea koʻikoʻi kāna hana i ka hana palekana o nā alahaka.Li et al. 1 i nā waiwai o 20MnTiB kila maʻamau i hoʻohana ʻia ma ka papa 10.9 kiʻekiʻe-ikaika bolts i ke kiʻekiʻe wela o 20 ~ 700 ℃, a loaʻa i ka stress-strain curve, yield strength, tensile strength, Young's modulus, and elongation. a me ka huina hoonui.Zhang et al. 2, Hu et al. 3, etc., ma o kemika haku ho'āʻo, mechanical waiwai ho'āʻo, microstructure ho'āʻo, macroscopic a me ka microscopic ka nānā 'ana o ka ili ili, a me nā hualoaʻa e hōʻike i ke kumu nui no ka haʻihaʻi o kiʻekiʻe-ikaika bolts pili i ka thread defects, a me ka hiki mai o ka milo defects Nui koʻikoʻi koʻikoʻi, māwae piko koʻikoʻi kuʻina a me ka hamama-ea pohā nā kūlana a pau alakai i stress corrosion.
Hoʻohana pinepine ʻia nā kīʻaha ikaika kiʻekiʻe no nā alahaka kila no ka manawa lōʻihi ma kahi ʻano haʻahaʻa. ʻO ke ola o nā bolts ikaika kiʻekiʻe a hiki i ke kumu e haki ai. I kēia manawa, nui nā noiʻi e pili ana i ka hopena o ka ʻino kaiapuni ma ka hana ʻino o nā mea. Ua noiʻi ʻo Catar et al. 3.5% NaCl solution ma ke alo o ka like ole o ka sulfide ions.Aghion et al.6 loiloi i ka hana corrosion o die-cast magnesium alloy MRI230D ma ka 3.5% NaCl solution ma ka hoao ana, ka paakai hoao, potentiodynamic polarization analysis and SSRT.Zhang et al.7 i aʻo i ka 9. a loaʻa ka hopena o nā ions chloride ma ke ʻano ʻino ʻino o ke kila martensitic ma ka lumi wela. Ua noiʻi ʻo Chen et al.8 i ka hana corrosion stress a me ka hana ʻoki ʻana o ke kila X70 i loko o ka hoʻonā ʻana o ka lepo moana i hoʻohālikelike ʻia me SRB ma nā mahana like ʻole e SSRT.Liu et al.9 i hoʻohana i ka SSRT e aʻo i ka hopena o ka wela a me ka tensile strain corrosion rate on the sea tensile corrosion rate. 00Cr21Ni14Mn5Mo2N austenitic stainless steel. Hōʻike nā hualoaʻa i ka mahana ma ka laulā o 35 ~ 65 ℃ ʻaʻohe hopena koʻikoʻi i ka hana corrosion stress o ke kila kila.Lu et al. 10 loiloi i ka lohi haʻihaʻi susceptibility o Eia kekahi laʻana me ka likeʻole tensile ikaika māka e ka haawe make lohi fracture ho'āʻo a me SSRT.It ua manaʻo 'ia i ka tensile ikaika o 20MnTiB kila a me 35VB kila kiʻekiʻe-ikaika bolts e hoomaluia ma 1040-1190MPa.However. e hoʻohālike i ke kaiapuni corrosive, ʻoiai ʻo ka hoʻohana maoli ʻana i nā pōkā ikaika kiʻekiʻe e ʻoi aku ka paʻakikī a he nui nā mea hoʻoikaika, e like me ka pH waiwai o ka bolt.Ananya et al. Ua aʻo ʻo 11 i ka hopena o nā ʻāpana kaiapuni a me nā mea i loko o ke ʻano corrosive ma luna o ka corrosion a me ke koʻikoʻi ka pohā ʻana o ka duplex stainless steels.Sunada et al. 12 hana lumi wela stress corrosion pohā nā ho'āʻo ma SUS304 kila i aqueous hāʻina i loaʻa H2SO4 (0-5.5 kmol / m-3) a me NaCl (0-4.5 kmol / m-3) .The hopena o H2SO4 a me NaCl ma ka corrosion ano o SUS304 kila, ua hoʻopaʻa 'ia i ka SSRT i ka hoʻohana 'ana i ka wela a me nā hopena o ka wela. CO2 / CO ka hoʻopaʻa 'ana, kinoea kaomi a me ka corrosion manawa ma luna o ka stress corrosion susceptibility o A516 kaomi ipu kila. E hoʻohana ana i ka NS4 solution ma ke ano he groundwater simulating solution, Ibrahim et al. Ua noiʻi ʻo 14 i ka hopena o nā ʻāpana kaiapuni e like me ka bicarbonate ion (HCO), ka pH a me ka mahana ma ke koʻikoʻi corrosion māwae o API-X100 pipeline kila ma hope o ka ʻili ʻana i ka uhi. Shan et al. 15 ua aʻo i ka hoʻololi kānāwai o stress corrosion māhā susceptibility o austenitic kuhiliʻole kila 00Cr18Ni10 me ka mahana ma lalo o ka 'okoʻa wela kūlana (30 ~ 250 ℃) ma lalo o ke kūlana o ka eleele wai mea i loko o simulated lanahu-i-hydrogen mea kanu e SSRT.Han et al.16 characterized ka hydrogen embrittlement fracthability o ka ho'āʻo kiʻekiʻe deloaded bolt-strength. a me SSRT.Zhao17 i aʻo i ka hopena o ka pH, SO42-, Cl-1 ma ka stress corrosion behavior o GH4080A huila e SSRT.The results show that the lower the pH value, the worse the stress corrosion resistance of the GH4080A alloy.It has obvious stress corrosion sensitivity to Cl-1, and is not sensitive to SO42. ka hopena o ka ʻino kaiapuni ma 20MnTiB kila ikaika ikaika.
I mea e ike ai i na kumu o ka hemahema o ka ikaika ikaika bolts i hoohana ia ma na alahaka, ka mea kakau ua hana i ka moʻo o ka noiʻi. High-ikaika bolt samples ua kohoia, a me na kumu o ka hemahema o keia mau laʻana ua kūkākūkāʻia mai nā kuanaʻike o ka kemikala haku mele, fracture microscopic morphology, metallographic hale a me ka mechanical waiwai anaana ma ka hoʻokolokolo 'ana o ka Chosedngic makahiki ma ka hoʻokolokolo 'ana i ka Chosedngic makahiki i ka makahiki 20. Ua hoʻolālā ʻia kahi hoʻolālā ʻino e hoʻohālikelike ana i ke aniau haʻahaʻa o Chongqing. Ua hoʻokō ʻia nā hoʻokolohua corrosion stress, electrochemical corrosion hoʻokolohua a me ka corrosion fatigue hoʻokolohua o nā kī ikaika kiʻekiʻe ma Chongqing simulated humid climate. nā ho'āʻo, ka macroscopic fracture a me ka microscopic analysis, a me nā huahana corrosion surface.
Aia ʻo Chongqing ma ke komohana hema o Kina, ʻo ka uka o ka muliwai ʻo Yangtze, a he humid subtropical monsoon climate.The makahiki awelika mahana he 16-18 ° C, ʻo ka haʻahaʻa haʻahaʻa o ka makahiki he 70-80%, ʻo nā hola o ka lā he 1000-1400 hola, a ʻo ka pākēneka o ka lā he 25% wale nō.
Wahi a nā hōʻike e pili ana i ka lā a me ka mahana ambient ma Chongqing mai 2015 a 2018, ʻo ka awelika o ka mahana o kēlā me kēia lā ma Chongqing he haʻahaʻa e like me 17 ° C a hiki i ka 23 ° C. ʻO ka wela kiʻekiʻe loa ma ke kino alahaka o Chaotianmen Bridge ma Chongqing hiki ke hiki i 50 ° C ° C21,22. No laila, ua hoʻonohonoho ʻia nā pae wela no ka hoʻāʻo corrosion stress ma 25 ° C a me 50 ° C.
Hoʻoholo pololei ka pH waiwai o ka hopena corrosion simulated i ka nui o ka H+, akā ʻaʻole ia he manaʻo ʻo ka emi ʻana o ka waiwai pH, ʻoi aku ka maʻalahi o ka corrosion. 7.5 i hui pū me ka noiʻi palapala23 a me ka pae pH o ka wai ua makahiki ma Chongqing.2010 a 2018.
ʻOi aku ka kiʻekiʻe o ka hopena o ka hopena corrosion i hoʻohālikelike ʻia, ʻoi aku ka nui o ka ion i loko o ka hopena corrosion simulated, a ʻoi aku ka nui o ka hopena i nā waiwai waiwai. (1×), 20 × kumu hoʻohālikelike hoʻoheheʻe hoʻoheheʻe ʻia (20 ×) a me 200 × kumu kumu hoʻohālikelike hoʻonā hoʻonā ʻino (200 ×).
ʻO ke kaiapuni me ka mahana o 25 ℃, pH waiwai o 5.5, a me ka ʻike ʻana o ka hopena corrosion simulated ka mea kokoke loa i nā kūlana hoʻohana maoli o nā bolts ikaika kiʻekiʻe no nā alahaka. pūʻulu.I ka wā i noiʻi ʻia ai nā hopena o ka wela, ka hoʻopaʻa ʻana a i ʻole ka pH waiwai o ka hopena corrosion i hoʻohālikelike ʻia i ka hana corrosion stress o nā bolts ikaika kiʻekiʻe, ʻaʻole i hoʻololi ʻia nā mea ʻē aʻe, i hoʻohana ʻia e like me ka pae hoʻokolohua o ka hui mana kuhikuhi.
Wahi a ka 2010-2018 atmospheric environment quality briefing i hoʻopuka ʻia e ka Chongqing Municipal Bureau of Ecology and Environment, a e pili ana i nā ʻāpana precipitation i hōʻike ʻia ma Zhang24 a me nā palapala ʻē aʻe i hōʻike ʻia ma Chongqing, kahi hopena corrosion simulated e pili ana i ka hoʻonui ʻana i ka manaʻo o SO42- ua hoʻolālā ʻia. Hōʻike ʻia ka hopena ʻino ma ka Papa 1:
Hoʻomākaukau ʻia ka hopena corrosion i hoʻohālikelike ʻia e ke ʻano kaulike o ka ion ion me ka hoʻohana ʻana i nā reagents analytical a me ka wai distilled.
I mea e hoʻohālike ai i ke aniau humid ma Chongqing, ua hoʻololi kūikawā a hoʻolālā ʻia ka mea hōʻike paʻakai paʻakai 25. E like me ka hōʻike ʻana ma ka Figure 1, ʻelua mau ʻōnaehana hoʻokolohua: ʻo ka ʻōnaehana paʻakai a me kahi ʻōnaehana kukui. compressor.The induction part is composed of temperature ana elements, which sense the temperature in the test chamber.The control part is computered of microcomputer, which connects the spray part and the induction part is composed to control the whole experimental process.The lighting system is in a salt spray test chamber to simulate the sunscreen. ka mahana a puni ka hāpana i ka manawa maoli.
Hoʻomaʻemaʻe mua ʻia nā mea hoʻoheheʻe koʻikoʻi me ka acetone a me ka hoʻomaʻemaʻe ultrasonic mechanical e wehe i ke koena o ka ʻaila, a laila hoʻomaloʻo ʻia i loko o ka ʻenekini hoʻomaʻemaʻe i ka ʻaila, a laila hoʻomaloʻo ʻia i loko o ka umu. o ka paakai e ho'āʻo mea paʻakai e simulate i ka corrosion kūlana i loko o humid aniau kaiapuni o Chongqing.According i ka maʻamau NACETM0177-2005 a me ka paʻakai pulupulu ho'āʻo maʻamau GB / T 10,125-2012, i ka hoʻopaʻa haʻahaʻa kaumaha corrosion ho'āʻo manawa i loko o kēia haʻawina ua uniformly hooholo i ka 168 h. MTS-810 universal tensile ho'āʻo mīkini, a me ko lakou mechanical waiwai a me fracture corrosion morphology ua kālailai 'ia.
Hōʻike ka Kiʻi 1 i ka macro- a me ka micro-morphology o ka ʻili o ka ʻili o nā mea hoʻoheheʻe ʻana i ke koʻikoʻi kiʻekiʻe ma lalo o nā kūlana corrosion like ʻole.2 a me 3.
Macroscopic morphology o stress corrosion specimens o 20MnTiB kiʻekiʻe-ikaika bolts ma lalo oʻokoʻa simulated corrosion kaiapuni: (a) ole corrosion; (b) 1 manawa; (c) 20 ×; (d) 200 ×; (e) pH3.5; (f) pH 7.5; (g) 50°C.
Micromorphology o nā huahana corrosion o 20MnTiB kiʻekiʻe-ikaika bolts i likeʻole simulated corrosion kaiapuni (100×): (a) 1 manawa; (b) 20 ×; (c) 200 ×; (d) pH3.5; (e) pH7 .5; (f) 50°C.
Hiki ke ʻike ʻia mai Fig. 2a ʻo ka ʻili o ka mea hoʻoheheʻe ikaika kiʻekiʻe i hoʻopaʻa ʻole ʻia e hōʻike ana i ka ʻālohilohi metala ʻole me ka ʻike ʻole ʻia. ʻino, a ʻaʻohe hopena o ka hopena corrosion i hoʻohālikelike ʻia ma ka ʻili o ka hāpana. He liʻiliʻi ka hopena o nā waiwai waiwai. Akā naʻe, ma lalo o ke kūlana o 20 × kumu kumu hoʻohālikelike corrosion solution concentration (Fig. 2c), ua uhi piha ʻia ka ʻili o ka pahu kiʻekiʻe kiʻekiʻe kiʻekiʻe bolt specimen e ka nui o nā huahana tan corrosion a me kahi liʻiliʻi o brown-red corrosion. ʻO ka hoʻohālikelike ʻana i ka hopena corrosion solution kumu (Fig. 2d), ua uhi piha ʻia ka ʻili o ka hāpana e nā huahana corrosion brown, a ʻike ʻia nā huahana corrosion brown-black ma kekahi mau wahi.
I ka emi ʻana o ka pH i 3.5 (Fig. 2e), ʻoi aku ka nui o nā huahana ʻeleʻele ʻeleʻele ma ka ʻili o nā laʻana, a ua exfoliated kekahi o nā huahana corrosion.
Hōʻike ka 2g i ka piʻi ʻana o ka mahana i 50 °C, ʻo ka maʻiʻo o nā huahana corrosion brown-ulaʻula ma luna o ka ʻili o ka hāpana e hoʻemi nui ʻia, ʻoiai ʻo nā huahana corrosion brown e uhi i ka ʻili o ka hāpana ma kahi ākea.
E like me ka hoike ana ma ka Figure 3, ma lalo o ka likeʻole corrosion kaiapuni, i ka corrosion huahana ma luna o ka ili o 20MnTiB kiʻekiʻe-ikaika bolt stress corrosion specimens ua maopopo delaminated, a me ka mānoanoa o ka corrosion papa mahuahua me ka hoonui ana o ka noonoo ana o ka simulated corrosion solution.Ma lalo o ke kūlana o ka kumu hoʻohālike corrosion 3a hiki ke maheleia ka ili kumu. i loko o ʻelua papa: ʻo ka papa o waho o nā huahana corrosion ua māhele like ʻia, akā ʻike ʻia ka nui o nā māwae; ʻO ka ʻāpana o loko he pūpū o nā huahana corrosion. Ma lalo o ke kūlana o 20 × kumu kumu simulated corrosion solution concentration (Fig. 3b), hiki ke hoʻokaʻawale ʻia ka papa corrosion ma ka ʻili o ka hāpana i ʻekolu mau papa: ʻo ka ʻaoʻao o waho ka mea nui i hoʻopuehu ʻia nā huahana corrosion cluster, nā mea wehe a porous, a ʻaʻohe hana pale maikaʻi; ʻO ka papa waena he papa huahana corrosion like ʻole, akā aia nā māwae maopopo, a hiki i nā ion corrosion ke hele i nā māwae a hoʻopau i ka substrate; ʻO ka papa o loko he papa huahana corrosion nui me ka ʻike ʻole ʻia o nā māwae, a he hopena maikaʻi ka pale ʻana i ka substrate.Ma lalo o ke kūlana o 200 × kumu kumu hoʻohālikelike corrosion solution concentration (Fig. 3c), hiki ke hoʻokaʻawale ʻia ka papa corrosion ma ka ʻili o ka hāpana i ʻekolu mau papa: ʻo ka ʻaoʻao o waho he ʻāpana ʻāpana lahilahi a kūlike; ʻO ka papa waena ka nui o ka petal-shaped a me ka flake-shaped corrosion ʻO ka ʻaoʻao o loko he ʻāpana huahana corrosion me ka ʻike ʻole ʻia o nā māwae a me nā lua, he hopena pale maikaʻi i ka substrate.
Hiki ke ʻike ʻia mai Fig. 3d i loko o ka simulated corrosion environment o pH 3.5, aia ka nui o nā flocculent a i ʻole nā ​​​​mea e like me ka nila-like corrosion huahana ma ka ʻili o ka 20MnTiB kiʻekiʻe ikaika bolt specimen. It is speculated that these corrosion products are mainly γ-FeOOH and a little amount of the α-FeOOH layer and the little amount of the α-FeOOH layer and the small amount of the α-FeOOH layer. māwae.
Hiki ke ʻike ʻia mai ka Fig. 3f i ka wā i piʻi ai ka mahana i 50 °C, ʻaʻole i ʻike ʻia ka ʻōpala ʻōpala o loko i ʻike ʻia i loko o ka hale corrosion layer, e hōʻike ana he mau hakahaka ma waena o nā papa corrosion ma 50 °C, ʻo ia ka mea i uhi ʻole ʻia ka substrate e nā huahana corrosion. Hāʻawi i ka pale mai ka hoʻonui ʻia ʻana o ke ʻano corrosion o ka substrate.
Hōʻike ʻia ma ka Papa 2 nā ʻano mekini o nā kī ikaika kiʻekiʻe ma lalo o ke koʻikoʻi koʻikoʻi o ka ukana ma nā wahi ʻino like ʻole.
Hiki ke ʻike ʻia mai ka Papa 2 e hoʻokō mau ana nā ʻano mechanical o ka 20MnTiB kiʻekiʻe-ikaika bolt specimens i nā koi maʻamau ma hope o ka hoʻāʻo ʻana i ka corrosion hoʻomaʻamaʻa maloʻo maloʻo i ka hoʻāʻo ʻana i ka corrosion hoʻāʻo i nā ʻano ʻino simulated like ʻole, akā aia kekahi pōʻino i hoʻohālikelike ʻia me nā mea uncorroded.sample. ʻO 200 × ka manaʻo o ka hopena i hoʻohālikelike ʻia, ua emi nui ka elongation o ka hāpana. Ua like nā ʻano mechanical i nā ʻano o 20 × a me 200 × kumu kumu hoʻohālikelike corrosion solutions. I ka wā i emi ai ka pH waiwai o ka hopena corrosion simulated i 3.5, ʻo ka ikaika tensile a me ka elongation o nā mea hoʻohālike e emi nui i ka 50 ka ikaika o ka mahana a me ka hoʻemi nui ʻana o ka tensile °C. a ua kokoke loa ka huina hoemi i ka waiwai ma'amau.
Hōʻike ʻia nā morphologies haʻihaʻi o ka 20MnTiB kiʻekiʻe ikaika bolt stress corrosion specimens ma lalo o nā ʻano ʻino ʻino like ʻole ma ke Kiʻi 4, ʻo ia ka macro-morphology o ka haʻihaʻi, ka ʻāpana fiber i waenakonu o ka haʻihaʻi, ka lehelehe micro-morphological o ka ʻili ʻili, a me ka ʻili o ka hāpana.
ʻO nā morphologies macroscopic a me ka microscopic fracture o 20MnTiB kiʻekiʻe-ikaika bolt specimens i hoʻohālikelike like ʻole ʻia (500×): (a) ʻaʻohe corrosion; (b) 1 manawa; (c) 20 ×; (d) 200 ×; (e) pH3.5; (f) pH7.5; (g) 50°C.
Hiki ke ʻike ʻia mai ka Fig. 4 ʻo ka haʻihaʻi ʻana o ka 20MnTiB kiʻekiʻe ikaika bolt stress corrosion specimen ma lalo o nā ʻano ʻino hoʻohālike like ʻole e hōʻike ana i kahi haki kīʻaha maʻamau. Ke hoʻohālikelike ʻia me ka mea hoʻoheheʻe ʻole ʻia (Fig. 4a), he liʻiliʻi ka ʻāpana waena o ka māwae fiber. , 'oi aku ka nui o ka lehelehe shear. Hōʻike kēia i ka poino nui o nā waiwai mechanical o ka mea ma hope o ka corrosion. Me ka hoʻonui ʻana o ka hoʻonā ʻana o ka corrosion solution i hoʻohālikelike ʻia, ua hoʻonui ʻia nā lua i loko o ka ʻāpana fiber i waenakonu o ka haʻihaʻi, a ʻike ʻia nā kuʻina waimaka. laʻana, a ua nui nā huahana corrosion ma luna o ka surface.sample.
Ua ʻike ʻia mai ka Figure 3d aia nā māwae i ʻike ʻia i ka papa corrosion ma ka ʻili o ka hāpana, ʻaʻohe hopena maikaʻi o ka pale ma ka matrix. Ma ka hopena corrosion i hoʻohālikelike ʻia o ka pH 3.5 (Figure 4e), ua ʻino loa ka ʻili o ka hāpana, a ʻike ʻia ka liʻiliʻi o ka ʻāpana waena. , Aia ka heluna nui o ka waimaka maʻamau ʻole i waenakonu o ka ʻāpana fiber. Me ka piʻi ʻana o ka waiwai pH o ka hopena corrosion i hoʻohālikelike ʻia, ʻo ka haʻihaʻi haʻihaʻi i loko o ka ʻāpana fiber i waenakonu o ka haʻihaʻi e emi iho, e emi mālie ka lua, a me ka hohonu o ka lua e emi mālie.
I ka piʻi ʻana o ka mahana i 50 °C (Fig. 4g), ʻo ka ʻāpana lehelehe shear lehelehe o ka haʻihaʻi o ka hāpana ka mea nui loa, ua hoʻonui nui ʻia nā lua ma ka ʻāpana kikowaena waena, a ua hoʻonui pū ka hohonu o ka lua, a ua hoʻonui ʻia ka pilina ma waena o ka ʻaoʻao lehelehe a me ka ʻili hoʻohālike. Ua hoʻonui ʻia nā huahana corrosion a me nā lua, i hōʻoia i ka hoʻonui ʻana i ka ʻino o ka substrate i hōʻike ʻia ma Fig. 3f.
ʻO ka pH waiwai o ka hopena corrosion e hoʻopōʻino i nā waiwai mechanical o 20MnTiB kiʻekiʻe ikaika bolts, akā ʻaʻole nui ka hopena. o ka corrosion huahana i loko o ka microscopic morphology o ka hāpana fracture.This hōʻike i ka hiki o ka hāpana e kū'ē deformation ma waho ikaika ua nui ho'ēmi 'ia i loko o ka acidic kaiapuni, a me ka degere o ka stress corrosion tendency o ka mea, ua nui hoʻonui.
He liʻiliʻi ka hopena o ka hopena corrosion i hoʻohālikelike ʻia i nā waiwai mechanical o nā hōʻailona bolt ikaika kiʻekiʻe, akā i ka hoʻonui ʻia ʻana o ka hopena corrosion i hoʻohālikelike ʻia i 20 mau manawa ma mua o ka hopena corrosion simulated, ua pōʻino loa nā ʻano mechanical o nā laʻana, a ua ʻike ʻia ka ʻino i loko o ka microstructure fracture. nā lua, nā māwae lua a me ka nui o nā huahana corrosion. I ka hoʻonuiʻiaʻana o ka hoʻonāʻana o ka corrosion solution i hoʻohālikelikeʻia mai ka 20 manawa a hiki i ka 200 manawa o ka hoʻonāʻana o ka corrosion solution i hoʻohālikelike muaʻia, ua nāwaliwali ka hopena o ka hoʻonāʻana i nā mea mechanical o ka mea.
Ke hoʻohālikelike ʻia ka mahana corrosion he 25 ℃, ʻaʻole loli nui ka hoʻoulu ʻana a me ka ikaika tensile o ka 20MnTiB kiʻekiʻe-ikaika bolt specimens i ka hoʻohālikelike ʻia me nā specimens uncorroded. ʻO ka lehelehe aʻe ka mea nui loa, a aia nā dimples ma ke kikowaena o ka fiber.
Ma hope o ka hoʻāʻo ʻana i ka corrosion i loko o ka hale e hoʻohālikelike i ke kaiapuni lewa ma Chongqing, ka ikaika tensile, ka hoʻoulu ʻana i ka ikaika, elongation a me nā ʻāpana ʻē aʻe o nā bolts ikaika kiʻekiʻe 20MnTiB ua hoʻemi ʻia, a maopopo ka pōʻino o ke koʻikoʻi. e hoʻopōʻino i ka plastic plastic i nā bolts kiʻekiʻe, e hoʻemi i ka hiki ke pale aku i ka deformation e nā mana o waho, a hoʻonui i ke ʻano o ka corrosion stress.
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