Corrosion ubedo piny acel madit ma nyayuvalvenyoth. Pieno, ivalvegwoko, valve anti-corrosion ubedo lembe ma pire tek mi paru.
Valvekit koro
Nyoth pa cuma wok ikum nyoth pa kemikol man nyoth pa mac, man nyoth pa piny ma epe ku cuma wok ikum tic pa kemikol man piny.
1. Nyoth pa kemikol
I thenge ma current epe, piny ma ucungu kudu timo tic ku cuma man enyothe, calu nyoth pa cuma ku yamo ma lyeth man non-electrolytic solution.
2. Galvanic corrosion
Dhahabu ne mako ku electrolyte, ma ukelo mol pa electrons, ma nyayu ret ikum tic pa electrochemical, ma en e yore madit mi nyai.
Nyoth pa acid-base salt solution, nyoth pa yamu, nyoth pa ngom, nyoth pa pii nam, nyoth pa microbial, nyoth pa pitting man nyoth pa crevice pa stainless steel, man mukende mapol, gi zo nyai pa electrochemical. Electrochemical corrosion timere ngo kende kende ikind piny aryo ma copo timo tic mi chemical, ento eketho bende tung tung mi kero ni kum tung tung mi dwong pa pii, tung tung mi dwong pa oxygen ma ucungo i ngete, tung tung manok mi kit ma piny ne utiye kudu, man mange, man enwango tego pa corrosion, kara cuma ma rwom pare lapiny man dry suposition pa plate unyai.
Kadhiri pa valve
Kite ma nyai pa piny copo pokere i dul abusiel:
(1) Ecungo ikum lyethu: kadhiri pa lyethu utiye piny pa 0.001 mm/mwaka
(2) Ma tek mandha: rwom pa lyethu 0.001 ku 0.01 mm/mwaka
(3) Gwoko lyethu: rwom pa lyethu 0.01 ku 0.1 mm/mwaka
(4) Podi ecungo ikum lyethu: rwom pa lyethu 0.1 ku 1.0 mm/mwaka
(5) Cwiny ma rac: rwom pa lyethu 1.0 ku 10 mm/mwaka
(6) Epe ku lyethu: kadhiri pa lyethu ubedo malac uloyu 10 mm/mwaka
Yore abungwen mi juku lyethu
1. Yer piny ma jwigere ngo nimakere ku piny ma jwigere kudu
I tic mi yubu piny mandha, nyai pa piny ma jutiyo kudu ubedo tek mandha, kadi nang valve ma jutiyo kudu i piny acel utiye marom, rwom, lyethu man tegu pa piny ne ukoc, man nyai pa piny ne utiye marom ungo. Ka 10°C umedire i rwom ma piny, kadhiri pa lyethu umedire wang 1~3.
Kit ma rwom pare ucungo kudu utiye ku tic madit ikum nyayu pa piny ma jutiyo kudu pi valve, calu ve lead utiye i sulfuric acid ku rwom ma nok, rwom ne nok akeca, man ka rwom ne ukadhu 96%, rwom ne medere matek. Carbon steel, ku tung tung, utiye ku nyai madit ka sulfuric acid ubedo 50%, man ka dwong ne umedire ni kadhu 60%, nyai ne dwoko piny. Ku lapor, aluminium nyai lee dit i nitric acid ma dwong ma romo 80%, ento nyai lee dit i nitric acid ma nyai man ma nok, man stainless steel nyayo nitric acid ma nyai, ento edoko rac i nitric acid ma kadhu 95%.
Kud i lapor malu, ecopu nen nia yero maber pa jam tic mi valve umaku ubed malubiri ku lembe moko, nyang ikum piny matung tung ma nyayu lyethu, man yero piny nimakere ku buku mi gwoko lyethu.
2. Ti ku piny ma epe ku cuma
Kite ma piny ma epe ku cuma ucungu kudu ber mandha, tek lyethu man tegu pa valve urombo ku piny ma epe ku cuma, ecopu jwigo peko kende ngo, ento ecopu gwoko cuma mabec. Kum valve, bonnet, lining, sealing surface man piny mukende ma pol kare jutiyo kudu ma epe ku cuma juyike.
Plastik macalo PTFE man chlorinated polyether, man bende natural rubber, neoprene, nitrile rubber man rubber mange jutiyu kudu pi valve lining, man dul madit pa valve body bonnet juyike ku cast iron man carbon steel. Eketho ngo tego pa valve kende, ento eketho bende valve ne utur ungo.
Tin eni, plastik madwong calu nylon man PTFE jutiyu kudu, man rubber man synthetic rubber jutiyu kudu pi yiku piny matung tung man rings, ma jutiyo kudu iwi valve matung tung. Jam piny ma epe ku cuma ma jutiyo kudu calu piny ma jukutho kudu, epe kende kende ku kero mi juku nyai, ento de gitiye ku tic maber mi juku, ma ber mandha pi tic kudu i media ku particles. Eyo, gitiye tek ungo man gicungo ikum lyethu, man tic migi nok.
3. Tiyu ku cuma
(1) Valve connection: Valve connection snail jutiyo kudu ku galvanizing, chrome plating, man oxidation (blue) mi medo kero mi juku lyethu man piny ma nyai. Mi medo ikum yore ma juweco pigi malu, jam mako piny mukende de jutiyo kudu ku yore ma tung tung calu ve phosphating nimakere ku lembe.
(2) Kethu piny man piny ma cego ku diameter ma nok: yore mi wi piny calu nitriding man boronizing jutiyu kudu pi medo kero pa piny man kero pa piny.
(3) Stem anti-corrosion: nitriding, boronization, chrome plating, nickel plating man yore mukende mi yiku piny iwi ngom jutiyo kudu lee pi medo kero pa corrosion, corrosion man abrasion resistance.
Kit tic matung tung mi wi ngom umaku obed maber pi piny matung tung man kabedo mi tic, i polo, pii ma mol man asbestos packing contact stem, ecopu tiyo ku chrome plating matek, yore mi gas nitriding (stainless steel umitu kud utii ku yore mi ion nitriding): i kabedo ma hydrogen sulfide tiyu ku electroplating ma phosphorus ma lee nick nick tiye ku tic maber uloyu; 38CrMOAIA copo bedu ma rwinyo ngo ku ion man gas nitriding, ento chrome coating matek epe pi tic kudu; 2Cr13 copo juku ammonia corrosion ingey quenching man tempering, man carbon steel ma jutiyo kudu ku gas nitriding copo juku ammonia corrosion, ma phosphorus-nickel plating layers zo gi juku ngo ammonia corrosion, man gas nitriding 38CrMOAIA material utiye ku kero maber mi juku corrosion man tic maber, man pol kare jutiyo kudu pi yiku stem vals.
(4) Kum valve ma nok man handwheel: Bende pol kare juyike ku chrome pi medo kero pare mi juku lyethu man mi deko valve.
4. Thermal spraying
Thermal spraying ubedo yore moko mi yubu coatings, man edoko acel ikin yore manyen mi gwoko piny. Etiye yore mi medo kero pa piny ma tiyo ku piny ma lyethu ma tek (wang pa gas, arc pa mac, arc pa plasma, lyethu pa mac, lyethu pa gas, man mukende mapol) mi lyethu man lwoko cuma nyo piny ma epe ku cuma, man jwigo gi iwi piny ma juyiko con i ayi mi atomization mi yubu spray coating, nyo lyethu piny ne i sawa marom, kara coating udok leng kendu iwi ngete pa substrate ni yubu yore mi medo kero pa spray welding layer.
Pol pa cuma man alloys migi, metal oxide ceramics, cermet composites man hard metal compounds jucopo ketho gi iwi cuma nyo non-metal substrates ku yore acel nyo madwong mi thermal spraying, ma copo medo kero pa wi ngom, kero mi rwinyo, kero mi lyethu man piny mukende, man medo kwo pa tic. Thermal spraying special functional coating, ku heat insulation, insulation (nyo mac ma rwinyo), grindable sealing, self-lubrication, thermal radiation, electromagnetic shielding man piny mukende ma pire tek, tic ku thermal spraying copo yiko piny.
5. Rub rangi
Coating ubedo piny ma jutiyo kudu lee pi jwigo lyethu, man etiye piny ma pire tek mi jwigo lyethu man lanyuth pa piny ma jutiyo kudu ku valve. Coating de ubedo piny ma epe ku cuma, ma pol kare juyike ku resin, rubber slurry, moo pa lum, solvent, man mukende mapol, ma umu wi cuma, poko kin piny man yamu, man timo tic mi juku nyai.
Coatings jutiyu kudu pol kare i pii, pii ma kadu, pii nam, yamu man kabedu mukende ma nyai ungo. Kabedo ma iye pa valve juyike ku rangi ma jwigo lyethu pi gwoko pii, yamu man piny mukende kud nyayu ret i valve
6. Med piny ma juku lyethu
Yore ma ju ma jwigo lyethu tiyo kudu pi jwigo lyethu utiye nya ekonyo polarization pa battery. Jam juku lyethu pa piny jutiyu kudu pol kare i media man fillers. Medu piny ma juku lyethu i piny copo jwigo lyethu pa jam tic man valve, calu chromium-nickel stainless steel in oxygen-free sulfuric acid, rwom ma lac mi lyethu i cremation state, lyethu ubedo rac uloyu, ento medu piny manok pa copper sulfate nyo nitric acid man oxidan pluts, copo dwoko stainless steel doko blunt steel kite, wi piny ma gwoko kum pi juku nyai pa piny, i hydrochloric acid, ka jumedo oxidant manok, nyai pa titanium copo bedu nok.
Tem pa pressure pa valve pol kare jutiyo kudu calu yore mi pimo pressure, ma yot ni nyayu lyethu pavalve, man medu sodium nitrite manok i pii ecopu juku lyethu pa valve ku pii. Asbestos packing utiye ku chloride, ma nyayu ret ikum valve stem, man chloride copo bedu nok ka jutiyo ku yore mi lwoko ku pii ma lyeth, ento yore eni tek mandha ni tiyo kudu, man ecopu bedu ngo ma dhanu zo ungiyo, man etiye kende kende pi yeny ma pire tek.
Pi gwoko valve stem man gwoko corrosion pa asbestos packing, i asbestos packing, corrosion inhibitor man sacrificial metal juketho iwi valve stem, corrosion inhibitor utiye ku sodium nitrite man sodium chromate, ma copo ketho passivation film iwi valve stem man medo kero pa valve stem, man timo solvent stem piny ma juku lyethu rwinyo moth moth man timo tic mi lwoko piny; I andha, zinc de ubedo piny ma juku lyethu, ma ecopu rwinyo ku chloride in asbestos, kara chloride ku stem metal ubed piny mandha, kara jutim tic mi juku lyethu.
7. Gwok pa mac
Tye kit ario mi gwoko kuc: gwoko pa anodic man gwoko pa cathodic. Ka zinc jutiyu kudu pi gwoko cuma, zinc unyai, zinc julwonge ni sacrificial metal, i tic mi yubu piny, anode protection jutiyu kudu manok, cathodic protection jutiyu kudu madwong. Yore mi gwoko cathodic eni jutiyu kudu pi valve madongo man valve ma pire tek, ma en e yore maber, yot man maber, man zinc ju medo i asbestos packing pi gwoko valve stem.
8. Gwok kabedo ma rac
Kabedo ma julwongo ni kabedu utiye ku kit ario mi nyang ma lac man nyang ma nok, nyang ma lac pa kabedu nyuthu kabedu ma ceng ikum kabedo ma juketho i iye valve man yore mi ngwec ma iye, man nyang ma nok pa kabedu nyuthu kite ma piny utiye kudu kama juketho valve i iye.
Pol pa kabedu eca jucopu jwigo ngo, man yore mi yubu piny jucopu loko ngo. Ka lembe moko marac ope ikum piny man yore, yore mi gwoko piny copo bedu, calu deoxygenation pa pii mi boiler, medu alkali i yub mi yiko moo pi dwoko PH value, man mange. Ku nen eni, medu piny ma juku lyethu man gwoko mac ma juweco pire malu eni de utiye yore mi gwoko piny ma nyayu lyethu.
Yamu upong ku buru, lyethu pa pii man iro, asaga in kabedo mi yubu piny, calu iro, yamu ma rac man buru maber ma wok kud i jam tic, ma copo nyayu lyethu matung tung i valve. Jatic ucikere ni yweyu man ni lwoko valve man ni medo pii kare ku kare nimakere ku cik mi tic, ma en e yore maber mi jwigo lyethu pa kabedu. Kethu piny ma gwoko iwi valve stem, ketho ground well iwi ground valve, man cwalo rangi iwi valve ubedo yore mi juku piny ma rac kud unyaivalve.
Medu pa lyethu man lyethu pa yamu, asaga pa jam tic man valve i kabedu ma cego, bi medo nyai migi, man kabedo mi tic ma oyabe nyoke yore mi yweyo man ngico umaku jutii kudu pi jwigo nyai pa kabedu.
9. Medu diro mi tic man kit ma valve nen kudu
Gwoko piny ma nyayu lyethu pavalveutiye peko ma jular juparu kudu nicaku i acaki mi yiku, man piny ma juyubu ku valve ku yiku maber man yore mi tic maber bi bedu ku adwogi maber ikum dwoko piny nyai pa valve. Pieno, dipatmen mi yiku man mi yubu piny ucikere ni yubu piny ma rwinyo ngo i yiku ot, ma rwinyo i yore mi yubu piny man ma yot mi nyayu lyethu, kara gi rombu ku yeny mi tic matung tung.
Saa mi cwalo: Jan-22-2025
