Nsɛe yɛ nneɛma a ɛho hia sen biara a ɛde ba no mu biakovalvesɛe. Enti, wɔvalveahobammɔ, valve anti-corrosion yɛ asɛm a ɛho hia a ɛsɛ sɛ wususuw ho.
Valve a wɔde yɛ adwumacorrosion kwan a wɔfa so yɛ ade
Nnuru a wɔde yɛ nneɛma a ɛporɔw ne anyinam ahoɔden a wɔde yɛ nneɛma titiriw na ɛde dade a ɛporɔw ba, na mpɛn pii no, nnuru ne nipadua mu nneyɛe tẽẽ na ɛma nneɛma a ɛnyɛ dade asɛe no.
1. Nnuru a wɔde yɛ nneɛma a ɛyɛ mmerɛw
Wɔ tebea a ɛmma anyinam ahoɔden biara mma mu no, ade a atwa ho ahyia no ne dade no yɛ adwuma tẽẽ na ɛsɛe no, te sɛ mframa a ɛyɛ hyew a ɛyɛ hyew ne aduru a ɛnyɛ anyinam ahoɔden a ɛma dade no sɛe.
2. Galvanic a ɛyɛ nwura
Dade no ne electrolyte no di nkitaho, na ɛma electron ahorow no sen, na ɛma anyinam ahoɔden a ɛyɛ ade titiriw a ɛma ɛyɛ mmerɛw sɛe ne ho.
Acid-base salt solution a ɛtaa yɛ nsɛe, wim nsɛe, asase a ɛyɛ nsɛe, ɛpo mu nsuo a ɛyɛ nsɛeɛ, mmoawa nketenkete a ɛyɛ nsɛeɛ, pitting nsɛeɛ ne crevice corrosion a ɛwɔ dadeɛ a ɛnyɛ den mu, ne nea ɛkeka ho, nyinaa yɛ electrochemical corrosion. Ɛnyɛ sɛ anyinam ahoɔden mu nsunsuanso ba wɔ nneɛma abien a ebetumi adi nnuru mu dwuma ntam nko, na mmom ɛma nsonsonoe a ebetumi aba esiane nsonsonoe a ɛwɔ aduru no dodow mu, nsonsonoe a ɛwɔ oxygen a atwa ho ahyia no mu, nsonsonoe ketewaa a ɛwɔ ade no nhyehyɛe mu, ne nea ɛkeka ho nti, na enya tumi a ɛde nsɛe, ma enti dade a tumi sua ne gyinabea a owia mprɛte a ɛyɛ dry no wɔ no yera.
Valve no mu nsu a ɛyɛ mmerɛw
Wobetumi akyekyɛ sɛnea nsɛe no mu yɛ den no mu asia:
(1) Ɛyɛ nea ɛko tia nsɛe koraa: nsɛe dodow no nnu 0.001 mm/afe
(2) Ɛyɛ nea ɛko tia nsɛe kɛse: nsɛe dodow 0.001 kosi 0.01 mm/afe
(3) Nsɛe a ɛko tia: nsɛe dodow 0.01 kosi 0.1 mm/afe
(4) Ɛda so ara tumi gyina nsɛe ano: nsɛe dodow 0.1 kosi 1.0 mm/afe
(5) Nsɛe a ɛnyɛ papa: nsɛe dodow 1.0 kosi 10 mm/afe
(6) Ɛnyɛ nea ɛko tia nsɛe: nsɛe dodow no boro mm 10/afe
Nneɛma akron a wɔde ko tia nsɛe
1. Paw nneɛma a ɛko tia nsɛe sɛnea ade a ɛma nsɛe no te
Wɔ adeyɛ ankasa mu no, nsunsuanso a ɛwɔ aduru no mu no yɛ den yiye, sɛ mpo valve ade a wɔde di dwuma wɔ ade koro no ara mu no yɛ pɛ, ɛsono sɛnea ade no dodow, ɔhyew ne nhyɛso a ɛwɔ ade no mu no yɛ pɛ, na nsunsuanso no nsɛe a ɛkɔ ade no so no nyɛ pɛ. Wɔ 10°C biara a ɛkɔ soro wɔ ɔhyew a ɛwɔ mfinimfini mu no, nsɛe no kɔ soro bɛyɛ mpɛn 1 ~ 3.
Nsuo a ɛwɔ mfimfini no nya nkɛntɛnsoɔ kɛseɛ wɔ valve adeɛ no nsɛeɛ so, te sɛ kɔbere no wɔ sulphuric acid no mu a ɛwɔ dodoɔ ketewaa bi, nsɛeɛ no sua koraa, na sɛ dodoɔ no boro 96% a, nsɛeɛ no kɔ soro kɛseɛ. Nea ɛne no bɔ abira no, carbon dade na ɛwɔ nsɛe a emu yɛ den sen biara bere a sulphuric acid dodow bɛyɛ 50%, na sɛ dodow no kɔ soro boro 60% a, nsɛe no so tew kɛse. Sɛ nhwɛso no, aluminium yɛ nea ɛporɔw kɛse wɔ nitric acid a wɔahyɛ no den mu a ne dodow boro 80%, nanso ɛsɛe kɛse wɔ nitric acid a ɛwɔ mfinimfini ne nea ɛba fam mu, na dade a ɛnyɛ den no tumi gyina nitric acid a ɛyɛ mmerɛw ano yiye, nanso ɛyɛ kɛse wɔ nitric acid a ɛyɛ den bɛboro 95% mu.
Efi atifi hɔ nhwɛso ahorow no mu no, yebetumi ahu sɛ ɛsɛ sɛ wogyina tebea pɔtee no so paw nneɛma a wɔde yɛ valve no yiye, hwehwɛ nneɛma ahorow a ɛka nsɛe mu, na wɔpaw nneɛma sɛnea nhoma ahorow a ɛfa ho a ɛko tia nsɛe kyerɛ no.
2. Fa nneɛma a ɛnyɛ dade di dwuma
Non-metallic corrosion resistance yɛ papa, bere tenten a ɔhyew ne nhyɛso a valve no di ahwehwɛde ahorow a ɛnyɛ dade nneɛma, ɛnyɛ sɛ ebetumi adi corrosion haw no ho dwuma nko, na mmom ebetumi agye dade a ɛsom bo nso. Wɔyɛ valve nipadua, bonnet, lining, sealing surface ne nneɛma afoforo a wɔtaa de di dwuma a ɛnyɛ dade.
Wɔde plastic te sɛ PTFE ne chlorinated polyether, ne abɔde mu rɔba, neoprene, nitrile rɔba ne rɔba afoforo di dwuma de yɛ valve a wɔde kata so, na wɔde dade a wɔde ayɛ ne carbon dade na ɛyɛ valve nipadua bonnet no nipadua titiriw. Ɛnyɛ sɛ ɛhwɛ ma valve no ahoɔden nko, na mmom ɛhwɛ nso sɛ valve no nsɛe.
Mprempren, wɔde plastic pii te sɛ nylon ne PTFE di dwuma, na wɔde abɔde mu rɔba ne rɔba a wɔayɛ no yɛ nneɛma ahorow a wɔde kata so ne nkaa a wɔde kata so, a wɔde di dwuma wɔ valve ahorow so. Saa nneɛma a ɛnyɛ dadeɛ a wɔde di dwuma sɛ nsɔano ani no nyɛ sɛ ɛwɔ ahoɔden a ɛko tia nsɛeɛ nko, na mmom ɛwɔ nsɔano adwumayɛ pa nso, a ɛfata titire sɛ wɔde di dwuma wɔ nsɛm ho amanneɛbɔ a ɛwɔ nneɛma nketenkete mu. Nokwarem no, wɔnyɛ den pii na ɛnyɛ hyew, na nneɛma ahorow a wɔde di dwuma no sua.
3. Dade a ɛwɔ soro a wɔde sa yare
(1) Valve nkitahodi: Wɔtaa de galvanizing, chrome plating, ne oxidation (blue) yɛ valve connection snail no ho adwuma na ama tumi a ɛko tia wim ne mfinimfini nsɛe no atu mpɔn. Wɔ akwan a yɛaka ho asɛm wɔ atifi hɔ no akyi no, wɔde nnuru afoforo a wɔde kyekyere nneɛma nso ho adwuma te sɛ phosphating sɛnea tebea no te.
(2) Seling surface ne closed parts a ne diameter ketewa: wɔde surface akwan te sɛ nitriding ne boronizing di dwuma de ma ne corrosion resistance ne wear resistance tu mpɔn.
(3) Stem anti-corrosion: nitriding, boronization, chrome plating, nickel plating ne afoforo soro ayaresa akwan na wɔde di dwuma kɛse de ma ne corrosion resistance, corrosion resistance ne abrasion resistance tu mpɔn.
Ɛsɛ sɛ ayaresa ahorow a ɛwɔ soro no fata ma nnua nneɛma ahorow ne adwumayɛbea ahorow, wɔ wim, nsu a ɛyɛ hyew medium ne asbestos packing contact stem, betumi de chrome plating a ɛyɛ den adi dwuma, gas nitriding nhyehyɛe (ɛnsɛ sɛ dade a ɛnyɛ den de ion nitriding kwan di dwuma): wɔ hydrogen sulfide wim tebea a wɔde electroplating di dwuma no mu no, phosphorus nickel a ɛkorɔn a wɔde kata so no wɔ ahobammɔ adwumayɛ a eye 38CrMOAIA nso betumi ayɛ nea ɛko tia nsɛe denam ion ne gas nitriding so, nanso chrome a ɛyɛ den a wɔde kata so no mfata sɛ wɔde di dwuma; 2Cr13 tumi ko tia ammonia nsɛe bere a wɔadum na wɔayɛ no hyew akyi, na carbon dade a wɔde gas nitriding di dwuma no nso betumi ako atia ammonia nsɛe, bere a phosphorus-nickel plating layers nyinaa ntumi nnyina ammonia nsɛe ano, na gas nitriding 38CrMOAIA ade no wɔ nsɛe a ɛkyɛn so na ɛyɛ adwuma a edi mũ, na wɔde di dwuma kɛse de yɛ valve stems.
(4) Valve nipadua ne nsa ntwahonan a ɛyɛ nketewa: Wɔtaa de chrome nso kata so na ama ne nsɛe a ɛko tia no atu mpɔn na asiesie valve no.
4. Ɔhyew a wɔde petepete so
Ɔhyew a wɔde petepete nneɛma so yɛ ɔkwan bi a wɔfa so siesie nneɛma a wɔde kata so, na abɛyɛ mfiridwuma foforo a wɔde bɔ nneɛma ani ho ban no mu biako. Ɛyɛ ɔkwan a wɔfa so hyɛ nneɛma a ɛwɔ soro denden a ɛde ɔhyew fibea ahorow a ahoɔden kɛse wom (gas combustion flame, electric arc, plasma arc, electric heating, gas explosion, ne nea ɛkeka ho) di dwuma de yɛ hyew na ɛbɔ dade anaa nneɛma a ɛnyɛ dade, na wɔde petepete so wɔ mfitiase soro a wɔadi kan ayɛ ho adwuma no so wɔ atomization kwan so ma ayɛ aduru a wɔde petepete so, anaasɛ ɛma mfitiase no yɛ hyew bere koro no ara mu, sɛnea ɛbɛyɛ a nea wɔde kata so no bɛsan ayɛ hyew wɔ ɔfasu no so substrate no ma ɛyɛ ɔfasu ahoɔden nhyehyɛe a spray welding layer.
Dade dodow no ara ne nea wɔde afrafra, dade oxide dɔte, cermet a wɔabom ne dade a ɛyɛ den a wɔde afrafra betumi akata dade anaa nea ɛnyɛ dade a wɔde afra so denam ɔkwan biako anaa pii a wɔfa so petepete ɔhyew so, a ebetumi ama nsu a ɛwɔ soro a ɛko tia nsɛe, asɛe, ɔhyew a ɛkɔ soro ne nneɛma afoforo a ɛko tia no atu mpɔn, na ama adwumayɛ nkwa nna akyɛ. Ɔhyew a wɔde petepete so titiriw dwumadi coating, a ɔhyew a wɔde siw ano, insulation (anaasɛ anyinam ahoɔden a ɛnteɛ), grindable sealing, ankasa srade, ɔhyew radiation, electromagnetic shielding ne nneɛma titiriw afoforo, ɔhyew a wɔde petepete a wɔde di dwuma betumi asiesie afã horow.
5. Fa aduru a wɔde petepete so
Coating yɛ ade a wɔde di dwuma kɛse a ɛko tia nsɛe, na ɛyɛ ade a ɛho nhia a ɛko tia nsɛe ne agyiraehyɛde a wɔde hu ade wɔ valve nneɛma so. Coating nso yɛ ade a ɛnyɛ dade, a wɔtaa de synthetic resin, rubber slurry, afifide mu ngo, solvent, ne nea ɛkeka ho na ɛyɛ, na ɛkata dade no ani, ɛtew medium ne wim tebea no ho, na ɛma wodu atirimpɔw a ɛne sɛ ɛbɛko atia nsɛe no ho.
Wɔde nneɛma a wɔde kata so di dwuma titiriw wɔ nsu, nkyene nsu, ɛpo mu nsu, wim ne mmeae afoforo a ɛnyɛ nea ɛyɛ hyew dodo. Wɔtaa de paint a ɛko tia nsuo a ɛporɔw gu valve no mu na amma nsuo, mframa ne nneɛma foforɔ ansɛe valve no
6. Fa nnuru a esiw nsɛe ano ka ho
Adwinnade a nnuru a esiw nsɛe ano di nsɛe so ne sɛ ɛma batere no yɛ polarization. Wɔde nnuru a esiw nsɛe ano di dwuma titiriw wɔ nsɛm ho amanneɛbɔ ne nneɛma a wɔde hyɛ mu mu. Nneɛma a esiw nsɛe a wɔde ka aduru no ho no betumi ama nnwinnade ne valve ahorow no nsɛe ayɛ brɛoo, te sɛ chromium-nickel dade a ɛnyɛ den a ɛwɔ sulfuric acid a oxygen nni mu mu, a ɛtumi nwura mu kɛse kɔ tebea a wɔde hyew nneɛma mu, nsɛe no yɛ aniberesɛm kɛse, nanso sɛ wɔde kɔbere sulfate anaa nitric acid ne nneɛma afoforo a ɛyɛ hyew kakraa bi ka ho a, ebetumi ama dade a ɛnyɛ den no adan tebea a ɛyɛ mmerɛw, nea ɛbɔ ho ban no ani film a ɛbɛma aduru no ansɛe, wɔ hydrochloric acid mu, sɛ wɔde oxidant kakraa bi ka ho a, wobetumi atew titanium no nsɛe so.
Wɔtaa de valve nhyɛso sɔhwɛ di dwuma sɛ ade a wɔde yɛ nhyɛso sɔhwɛ, a ɛnyɛ den sɛ ɛbɛma nsɛe wɔvalve, na sɛ wode sodium nitrite kakraa bi ka nsu no ho a, ebetumi asiw nsu a ɛbɛsɛe valve no ano. Asbestos packing no wɔ chloride, a ɛsɛe valve dua no kɛse, na chloride a ɛwɔ mu no betumi atew sɛ wɔfa ɔkwan a wɔfa so hohoro nsu a ɛyɛ hyew no so a, nanso ɛyɛ den yiye sɛ wɔde saa kwan yi bedi dwuma, na wontumi mma agye din wɔ ɔkwan a ɛkɔ akyiri so, na ɛfata ahiade titiriw nkutoo.
Sɛnea ɛbɛyɛ a wɔbɛbɔ valve dua no ho ban na wɔasiw asbestos a wɔde ahyɛ mu no nsɛe ano no, wɔ asbestos a wɔde ahyɛ mu no mu no, wɔde ade a esiw nsɛe ano ne dade a wɔde bɔ afɔre no akata valve dua no so, wɔde sodium nitrite ne sodium chromate na ɛyɛ nea esiw nsunsuanso ano no, a ebetumi ama pasivation film wɔ valve dua no ani na ama valve dua no nsɛe a ɛko tia no atu mpɔn, na aduru a wɔde hyɛ mu no betumi ayɛ nsɛe no inhibitor no de nkakrankakra tew na edi dwuma a ɛyɛ srade; Nokwarem no, zinc nso yɛ ade a esiw nsɛe ano, a ebetumi adi kan ne chloride a ɛwɔ asbestos mu no abom, ma enti chloride ne dua no dade a ɛne ne ho di nkitaho hokwan no so tew kɛse, sɛnea ɛbɛyɛ a wobetumi adu atirimpɔw a ɛne sɛ ɛbɛko atia nsɛe no ho.
7. Electrochemical ahobammɔ
Electrochemical ahobammɔ ahorow abien na ɛwɔ hɔ: anodic ahobammɔ ne cathodic ahobammɔ. Sɛ wɔde zinc di dwuma de bɔ dade ho ban a, zinc no sɛe, wɔfrɛ zinc sɛ afɔrebɔ dade, wɔ adeyɛ mu no, wɔmfa anode ahobammɔ nni dwuma kakraa bi, wɔde cathodic ahobammɔ di dwuma kɛse. Wɔde saa cathodic ahobammɔ kwan yi di dwuma ma valve akɛse ne valve ahorow a ɛho hia, a ɛyɛ ɔkwan a ɛho ka sua, ɛnyɛ den na etu mpɔn, na wɔde zinc ka asbestos a wɔde ahyɛ mu no ho de bɔ valve dua no ho ban.
8. Di nneɛma a atwa yɛn ho ahyia a ɛporɔw no so
Nea wɔfrɛ no nneɛma a atwa yɛn ho ahyia no wɔ ntease a ɛtrɛw ne ntease teateaa ahorow abien, nneɛma a atwa yɛn ho ahyia ho ntease a ɛtrɛw no kyerɛ nneɛma a atwa yɛn ho ahyia a atwa beae a wɔde valve besisi ne ne mu kyinhyia kwan no ho ahyia, na nneɛma a atwa yɛn ho ahyia ho ntease teateaa no kyerɛ tebea horow a atwa beae a wɔde valve besisi no ho ahyia.
Nneɛma a atwa yɛn ho ahyia dodow no ara yɛ nea wontumi nni so, na wontumi nsakra akwan a wɔfa so yɛ nneɛma no wɔ ɔkwan a wɔpɛ so. Sɛ ɛba sɛ ɛrensɛe ade no ne ɔkwan a wɔfa so yɛ no nkutoo a, wobetumi afa ɔkwan a wɔfa so di nneɛma a atwa yɛn ho ahyia no so, te sɛ deoxygenation a ɛwɔ boiler nsu mu, alkali a wɔde ka ho wɔ oil refining process no mu de sesa PH bo, ne nea ɛkeka ho Sɛ yɛhwɛ yi a, wɔde nnuru a esiw nsɛe ano ne electrochemical ahobammɔ a yɛaka ho asɛm wɔ atifi hɔ no aka ho no nso yɛ ɔkwan a wɔfa so siw nneɛma a atwa yɛn ho ahyia a ɛporɔw no so.
Mfutuma, nsuo a ɛyɛ hyew ne wusiw ahyɛ wim ma, titiriw wɔ baabi a wɔyɛ no, te sɛ wusiw brine, mframa a awuduru wom ne powder pa a nnwinnade de ba, a ɛbɛma valve no asɛe wɔ ɔkwan soronko so. Ɛsɛ sɛ nea ɔde di dwuma no hohoro na ɔhohoro valve no ho daa na ɔde pɛtro gu mu daa sɛnea nhyehyɛe a wɔde yɛ adwuma no kyerɛ no, na ɛno yɛ ɔkwan a etu mpɔn a wɔfa so siw nneɛma a atwa yɛn ho ahyia no nsɛe ano. Sɛ wode kataso a ɛbɔ ho ban bɛhyɛ valve no dua no so, wode fam abura bɛto fam valve no so, na wode paint apete valve no ani nyinaa yɛ akwan a wɔfa so siw nneɛma a ɛporɔw ano sɛ ɛbɛsɛevalve.
Ɔhyew a atwa yɛn ho ahyia ne mframa a wɔsɛe no a ɛkɔ soro, titiriw ma nnwinnade ne valve ahorow a ɛwɔ baabi a wɔato mu no bɛma wɔn nsɛe ayɛ ntɛmntɛm, na ɛsɛ sɛ wɔde adwumayɛbea ahorow a wɔabue anaa mframa ne onwini ho nhyehyɛe ahorow di dwuma sɛnea wobetumi biara de brɛ nneɛma a atwa yɛn ho ahyia mu nsɛe ase.
9. Tu mpɔn wɔ processing mfiridwuma ne valve nhyehyɛe
Ahobammɔ a ɛko tia nsɛe a ɛwɔ...valveyɛ ɔhaw a wɔasusuw ho fi mfiase a wɔyɛɛ nhyehyɛe no, na akyinnye biara nni ho sɛ valve aduru a ɛwɔ nhyehyɛe a ntease wom ne ɔkwan a wɔfa so yɛ adwuma no benya nkɛntɛnso pa wɔ valve no nsɛe a ɛbɛbrɛ ase no mu. Enti, ɛsɛ sɛ adwumayɛbea a wɔyɛ nhyehyɛe ne nea wɔyɛ no ma afã horow a ntease nnim wɔ adansi nhyehyɛe mu, akwan a wɔfa so yɛ adwuma a ɛnteɛ na ɛnyɛ den sɛ ɛbɛma nsɛe aba no tu mpɔn, sɛnea ɛbɛyɛ a wɔbɛsakra no ma ɛne adwumayɛ tebea ahorow ahwehwɛde ahorow ahyia.
Bere a wɔde bɛkyerɛw: Jan-22-2025
