Rawkralnak cu a chuahtertu thil biapi bik pakhat a sivalverawhnak. Cucaah,valvekilvennak, valve rawhnak dohnak cu ruah awk a biapi mi thil pakhat a si.
Valverawhnak phun
Thir hna i rawhnak cu a bik in chemical rawhnak le electrochemical rawhnak nih a chuahter, cun thir a si lomi thilri hna rawhnak cu a tlangpi in direct chemical le physical cawlcanghnak nih a chuahter.
1. Chemical rawhnak
Current a chuah lonak dirhmun tangah, a pawngkam thilri nih thir he direct in aa pehtlaih i a hrawh, cu bantuk cu thir cu a lum tukmi gas le electrolytic a si lomi cawhnuk nih a hrawhmi bantuk a si.
2. Galvanic rawhnak
Thir cu electrolyte he aa tong i, cu nih cun electron a luanter, cu nih cun amah le amah kha electrochemical cawlcanghnak nih a hrawh, cucu rawhnak phun bik a si.
A tlangpi in acid-base chiti cawhmi rawhnak, thli rawhnak, vawlei rawhnak, rili ti rawhnak, microbial rawhnak, pitting rawhnak le stainless steel rawhnak, tbk., hna cu electrochemical rawhnak an si dih. Electrochemical rawkralnak cu chemical rian a ttuan khomi thil pahnih karlak ah a cang lawng si loin, a cawhmi thilri i a tlawmtam aa dannak, a pawngkam oxygen a tlawmtam aa dannak, thilri sining tlawmpal aa dannak, tbk., ruangah a chuak khomi thil aa dannak zong a chuahter i, rawkralnak thazaang a hmuh, cucaah a tlawmmi thilti khawhnak a ngeimi thir le dry supply dirhmun cu a tlau.
Valve rawhnak rate
A rawhnak rate cu phun ruk ah tthen khawh a si:
(1) A tlingmi rawkralnak a tei khomi: rawkralnak rate cu 0.001 mm/kum nak tlawm deuh a si
(2) A rawk kho tukmi: rawkralnak rate 0.001 in 0.01 mm/kum
(3) Rawkralnak doh khawhnak: rawkralnak rate 0.01 in 0.1 mm/kum
(4) A rawkmi a tei rih: rawkralnak rate 0.1 in 1.0 mm/kum
(5) A ttha lomi rawhnak doh khawhnak: rawhnak rate 1.0 in 10 mm/kum
(6) Rawkralnak a tei kho lo: rawkralnak rate cu 10 mm/kum nak tam deuh a si
Rawkralnak dohnak thilri pakua
1. A rawk khomi thilri hna kha a rawk khomi thilri ningin thim
A taktak chuahnak ah, thilri rawhnak cu a har ngai, thilri pakhat ah hmanmi valve thilri cu aa khat ko hmanh ah, thilri i a tlawmtam, lum le lum lo aa dang, cun thilri ah thilri rawhnak cu aa khat lo. A tlawmbik lumnak ah 10°C a karh tik paoh ah, rawhnak rate cu a let 1~3 hrawng in a karh.
A tlawm deuhmi tlawmpal nih valve thilri rawhnak ah huham a ngei tuk, cu bantuk cu lead cu sulfuric acid chungah tlawmte lawng a um, rawhnak cu a tlawm tuk, cun 96% a lonh tikah rawhnak cu a kai ngaingai. Carbon thir cu, a dang tein, sulfuric acid tlawmtam 50% hrawng a si tikah a fak bikmi rawhnak a ngei, cun tlawmtam 60% nak tam a karh tikah, rawkralnak cu a zor ngaingai. Tahchunhnak ah, aluminum cu 80% nak tam a tlawmmi nitric acid ah a rawk kho ngai, asinain nitric acid a tlawm le a niam ah a rawk ngaingai, cun stainless steel cu a tlawmmi nitric acid kha a doh khawh ngai, asinain 95% nak tam a tlawmmi nitric acid ah a zual chin.
A cunglei tahchunhnak hna in, valve thilri thimnak dik cu a bik in thil sining cungah hram bunh in a si awk a si, rawkralnak a chuahtertu thil phunphun kha hlathlai awk a si, cun aa pehtlaimi rawkralnak dohnak cauk ningin thilri thim awk a si ti kha hmuh khawh a si.
2. Thir a si lomi thilri hmang
Thir a si lomi rawkralnak doh khawhnak cu a ttha tuk, valve lumnak le hneknak nih thir a si lomi thilri hna an herhmi a tlinh chung paoh cu, rawkralnak kong lawng si loin thir mansung zong a khamh khawh. Valve pum, bonnet, lining, sealing surface le a dang hman tawnmi thir a si lomi thilri hna cu an ser.
PTFE le chlorinated polyether tibantuk plastic pawl, cun natural rubber, neoprene, nitrile rubber le a dang rubber pawl cu valve lining caah hman an si, cun valve body bonnet a tlangpi cu thir le carbon thir in sermi a si. Valve thazaang lawng si loin valve a rawk lonak zong a hngalhter.
Tuchan ahcun, nylon le PTFE tibantuk plastic tam deuh le tam deuh hman a si cang, cun natural rubber le synthetic rubber cu kharnak cunglei phunphun le kharnak kuang phunphun sernak caah hman a si, cu hna cu valve phunphun ah hman an si. Hi thir a si lomi thilri hna cu kharnak cunglei ah hmanmi hna nih hin rawkralnak doh khawhnak lawng si loin kharnak riantuannak zong an ngei, cucu a hleiin thil hme tete he media ah hman awk ah aa tlak. A ngaingai ti ahcun, an thazaang a tlawm deuh i lumnak an tuar kho lo, cun hmannak hmunhma zong a tlawm.
3. Thir cunglei thlopnak
(1) Valve pehtlaihnak: Valve pehtlaihnak rungrul cu a tlangpi in thli le a tlawm deuhmi rawhnak doh khawhnak caah galvanizing, chrome plating, le oxidation (sen) in zohkhenh a si. A cunglei langhtermi lam hna lengah, a dang hrenhnak hna zong kha thil sining ning in phosphating tibantuk cunglei thlopnak in zohkhenh an si.
(2) A hmete in a cunglei le a kharmi thilri pawl kha khar: a rawkralnak le a rawkralnak a doh khawhnak caah nitriding le boronizing tibantuk a cunglei thil kalning hna kha hman a si.
(3) Stem anti-corrosion: nitriding, boronization, chrome plating, nickel plating le a dang cunglei thlopnak hna cu a rawkralnak doh khawhnak, rawkralnak doh khawhnak le hnahnawhnak doh khawhnak tthanchoternak caah tampi hman a si.
A phunphun in a cunglei zohkhenhnak cu a dangdang thinghnah thilri le riantuannak pawngkam caah aa tlakmi a si awk a si, thli lakah, ti lum le asbestos packing pehtlaihnak thinghnah, a harmi chrome plating, gas nitriding process (stainless steel nih ion nitriding process a hman awk a si lo) hman khawh a si: hydrogen sulfide thli pawngkam ah electroplating hmangin phosphorus tammi nick coatel nih a huhphenh khawh deuh; 38CrMOAIA cu ion le gas nitriding in rawkralnak a tei kho ve, asinain a harmi chrome thuhnak cu hman awkah aa tlak lo; 2Cr13 nih cun a hmit hnu le a lumter hnu ah ammonia rawhnak kha a doh khawh, cun gas nitriding hmangin carbon thir zong nih ammonia rawhnak kha a doh khawh, cu lioah phosphorus-nickel plating tthen vialte cu ammonia rawhnak kha a doh khawh lo, cun gas nitriding 38CrMOAIA thilri cu rawkralnak a doh khawhnak a ttha tuk i a tlingmi riantuannak a ngei, a tam deuh cu val stem sernak ah hman a si.
(4) A hmete mi valve pum le kutke: A rawkralnak a doh khawhnak ding le valve dawhternak ding caah chrome-plated zong a si tawn.
4. Lungthawhnak thletnak
Thermal spraying cu thilthuam sernak caah hmanmi lam phunkhat a si, cun thilri cunglei kilvennak caah thiamnak thar pakhat ah a cang. Mah cu a cunglei thazaang peknak lam a si i, cu nih cun thazaang sang a ngeimi lumnak hrampi (gas kanghnak mei, electric arc, plasma arc, electric lumternak, gas puahnak, tbk.) hmangin thir asiloah thir a si lomi thilri pawl kha a lumter i a lumter, cun a hlan tein tuahmi a hrampi cunglei ah atomization phun in a thlet i thletnak a ser, asiloah a hrampi kha a lumter, cucaah a lumter ṭhan substrate cunglei ah spray welding layer cunglei fehternak kalning ser awkah.
Thir tam deuh le an cawhmi, thir oxide ceramics, cermet composites le thir harmi hna cu thir asiloah thir a si lomi thilri cungah lumternak lam pakhat asiloah tam deuh in thuh khawh an si, cu nih cun a cunglei rawkralnak doh khawhnak, hruk khawhnak doh khawhnak, lum tuk doh khawhnak le a dang thilri hna kha a tthanter khawh, cun riantuannak caan sauhter khawh a si. Lungthawhnak thletnak special functional coating, lumnak khamnak, khamnak (asiloah a ttha lomi electric), rial khawhmi kharnak, mah tein hriak, lumternak, electric magnetic huhphenhnak le a dang a hleiin thilri hna he, lumternak hmannak nih thilri pawl a remh khawh.
5. Hmanthlak thlet
Coating cu a tlangpi in hmanmi rawkralnak dohnak thilri a si, cun rawkralnak dohnak caah a herhmi thilri le valve thilri cung i hngalh khawhnak hmelchunhnak a si. Coating cu thir a si lomi thilri zong a si, cu cu a tlangpi in sermi vutcam, rubber hnawm, thingthei chiti, cawhnuk, tbk. in sermi a si, thir cunglei kha a khuh, a chunglei le thli kha a thleidan, cun rawkralnak dohnak tinhmi a tlinter.
Coatings cu a bik in ti, chiti ti, rili ti, thli le a dang a rawk tuk lomi pawngkam ah hman a si. Valve chunglei kuang cu ti, thli le thilri dangdang nih valve a hrawh lonak hnga anticorosive paint in an suai tawn
6. Rawkralnak khamnak sii chap
Rawkralnak khamnak sii nih rawkralnak a uk khawhnak lam cu battery a tthencheunak a thanchoter caah a si. Rawkralnak khamnak sii cu media le filler ah hman bik an si. Cu thilri ah rawkralnak khamnak thilri chapnak nih thilri le valve hna rawhnak kha a zorter khawh, cu hna cu oxygen aa tel lomi sulfuric acid chung i chromium-nickel stainless thir tibantuk, mei in khanghnak dirhmun ah a tlawmmi a tlawm, rawkralnak cu a fak deuh, asinain copper sulfate asiloah nitric acid le a dang oxidan tlawmpal chapnak nih stainless thir kha a tlawmter khawh state, hydrochloric acid ah, oxidant tlawmpal chap ahcun, titanium rawhnak kha a zorter khawh.
Valve hneknak hneksaknak cu hneknak hneksaknak caah a tlangpi in hman a si tawn, cucu a fawimi rawhnak a chuahtervalve, cun ti chungah sodium nitrite tlawmpal cawh ahcun ti nih valve a rawhnak kha a kham khawh. Asbestos chiahnak ah chloride aa tel, cu nih cun valve stem kha a hrawh ngaingai, cun ti lum in tawlnak lam kha hman ahcun chloride a tlawmter khawh, asinain hi lam hi hman a har ngai, cun a tlangpi in mipi nih an theih khawh lo, cun a hleiin herhmi ca lawngah aa tlak.
Valve stem kilvennak le asbestos packing rawhnak khamnak caah, asbestos packing ah, rawhnak khamtu le raithawinak thir cu valve stem cungah an thuh, rawkralnak khamnak cu sodium nitrite le sodium chromate in sermi a si, cu nih cun valve stem cunglei ah passivation film a chuahter khawh i valve stem a rawhnak kha a tthanchoter khawh, solvent stem kha a ser khawh rawhnak khamnak sii cu zaangfah tein a rawk i hriak rian a ttuan; A ngaingai ti ahcun, zinc cu rawkralnak khamtu zong a si, cu nih cun asbestos chung i chloride he aa fonh hmasa khawh, cucaah chloride le stem thir pehtlaihnak caantha cu tampi a zorter, cucaah rawkralnak dohnak tinhmi kha a tlinter khawh.
7. Electrochemical kilvennak
Electrochemical kilvennak phun hnih a um: anodic kilvennak le cathodic kilvennak. Thir kilvennak caah zinc hman a si ahcun, zinc cu a rawk, zinc cu raithawinak thir tiah auh a si, thilchuah ning ahcun, anode kilvennak tlawm deuh hman a si, cathodic kilvennak tam deuh hman a si. Hi cathodic kilvennak lam hi valve ngan le a biapi mi valve caah hman a si, cucu a man a fawimi, a fawimi le a ttha ngaimi lam a si, cun valve hram kilvennak caah asbestos packing ah zinc an cawh.
8. A rawkmi pawngkam kha uk
Pawngkam tiah auhmi nih hin a kau ngaimi le a tlawmmi theihnak phun hnih a ngei, pawngkam a kau mi nih hin valve chiahnak hmun pawngkam le a chunglei a kalnak lam kha a chim duhmi a si, cun pawngkam timi nih hin valve chiahnak hmun pawngkam thil sining kha a chim duhmi a si.
Pawngkam tam deuh cu uk khawh lomi an si, cun thilchuah ningcang hna cu duhsah tein thlen khawh an si lo. Thilri le tuahsernak ah rawhralnak a um lo ahcun, pawngkam uknak lam kha hman khawh a si, cu hna cu, boiler ti kha oxygen chuahter, PH man remh awkah chiti thianhnak ah alkali chap, tbk. Hi hmuhning in, a cunglei ah langhtermi rawkralnak khamnak le electrochemical kilvennak chapnak zong hi rawkralnak pawngkam uk khawhnak lam pakhat a si.
Vancung cu leidip, ti lum le meikhu in a khat, a hlei in thilchuahnak pawngkam ah, meikhu brine, rungrul thli le thilri nih a chuahmi vutcam hmete tibantuk, cu nih cun valve ah a phunphun in rawhnak a chuahter lai. Riantuannak phunglam ningin riantuannak phunglam ningin riantuantu nih valve kha a thianh i a thianh peng awk a si, cucu pawngkam rawhnak uk khawhnak caah a ttha ngaimi thil a si. Valve hram ah huhphenhnak khuhnak chiah, vawlei valve cung ah vawlei tikhor chiah, le valve cunglei ah rong thlet cu a rawk khomi thilri nih a hrawh lonak ding lam vialte an sivalve.
Pawngkam lum le thli thurhnawmhnak a karh, a hlei in kharmi pawngkam ah thilri le valve hna caah, an rawhnak a rangter lai, cun pawngkam rawhnak zorternak caah a si khawh chungin onmi riantuannak hmun asiloah thli luhchuahnak le lumternak thilri pawl kha hman ding a si.
9. Thilri sernak thiamnak le valve sining tthanchoter
A rawhnak dohnak kilvennak cuvalvecu suaisam hramthawk tein ruahmi buaibainak a si, cun aa tlakmi dirhmun suaisamnak le a dikmi tuahsernak lam he valve thilri nih valve rawhnak zorternak ah tthatnak a chuahpi lai ti cu lunghrin awk a um lo. Cucaah, suaisamnak le sernak zung nih riantuannak dirhmun phunphun a herhmi he aa tlak khawh nakhnga, thilri suaisamnak ah aa tlak lomi, thil tuahning ah a dik lomi le rawhnak a chuahter fawimi thilri pawl kha an remh awk a si.
Post caan: Jan-22-2025
