Pitting waikura: ai. te tiaki i konganuku ki Methods waikura

Waikura i huaina whakangaromanga o te mata rauemi hohe rite ki te hua o te manawanui tukanga pitihāoratanga. Whakangaromanga o paparanga rauemi arata'i ki mate o te kaha, kawe ia hiko, nui haere brittleness me ētahi atu āhuatanga o te inhibition whakarewa.

I roto i riro nei ki raro i te mahi o ngā hua whakarewa ki te pānga ino o momo rerekē me ngā momo, i roto i nei tu i roto i pitting. Ko reira tino mōrearea, me te ohorere.

pitting waikura

I runga i te mata o ngā hua whakarewa kore he reira nohinohi kia kite i depressions iti i roto i ngā o parauri parauri ranei. karanga ēnei pūtaiao ira pitting, me te tukanga o ratou ahua - pitting. Puta te reira i runga i te mata o ngā rauemi i roto i te whakapā ki te rongoā te wai moana o ngā tai, matū pukuriri fluids me iteraa te tahi atu āhuatanga kino.

Pitting waikura pānga te konganuku me alloys hāngū anake, te whakawhanake te nuinga i roto i te apa waikura ranei ki nga wahi o ngā mea kohakore. "Mariao Point" kia pokanoa ki te mahi o ngā hua i kiriuhi kikokore me te tītipi ki te wae matotoru-taiepa. Ano, whakahaere ratou waikura ahua te hanganga o te kapiti te nui heke āhuatanga rauemi homai.

Aronui whati whakarewa

Hei whakahohe pitting titau te aroaro o rua matū hohe - activators me sequestrants. Ka rite ki maha mahi he ngota tīhiko activator o māota, pūkeha, iodine - kua kitea e ratou i roto i te nuinga o ngā taiao i roto i nei e whakahaeretia hua whakarewa. E adsorbed ratou ki te mata whakarewa, me te hanga i ki ona wāhanga complexes wairewa.

Ka rite ki passivating wai rōpū hydroxyl ranei maha mahi. Tonu puta tukanga whakangaromanga rite ki te kaupapa e whai ake nei:

1. E adsorbed katote activator i runga i te mata o te paruru (waikura) kiriata.
2. He he he tukanga o te whakauru o ngā katote hāora ki te tukanga o te katote activator.
3. He nui nui o ngā katote wairewa, ai nga wehenga kiriata.

Ka rite ki te hua, puta he rerekētanga pea i runga i te mata o te rauemi e tika ana ki te ngā rohe whakahohe tukanga anodic tere. oho te kupu katote activator ki te pokapū o te whati, e tika ana ki nei kauneke pitting waikura.

Ngā momo o pitting waikura

Te momo pitting waikura rerekē i runga i ngā āhuatanga taiao kei, te nuinga i runga i te pāmahana, pH, matū hanganga o matū. I raro i te mana o enei āhuatanga rerekē puka rua rahi me ratou whakaritenga. Ko te kupu, kia rite ki te rahi o te whakangaromanga pūwāhi taratahi:

• mōkitokito - rahi ira iti iho i te 0.1 mm;
• tikanga - te diameter o te poka rerekē i waenganui i 0.1 me te 1 mm;
• ulcerative ina nui hanganga 1 mm te whānui.

Tei runga i te wāhi o pitting waikura e taea e tuwhera kati ranei. I roto i te take tuatahi, ki te kitea tohu o te whakangaromanga, ko te tata e taea - he tika ki te whakamahi i mea motuhake. E arata'i pinepine te ana tēnei momo o te te waikura ki breakdowns.

Whakatuwheratia rusting kitea ki te kanohi tahanga. E mea pinepine pitting hanumi ki te hinonga kotahi. A, no te puta tenei kahore kinonga o te rauemi i roto i te hōhonu me te i roto i te whanui, no te mea o nei i reira he hē rohe nui.

puka o poka

Ko te puka o te pitting tei runga i te feāvaaki i roto i te wini whakakahokaho karaihe e hanga e i roto i te wāhanga tuatahi o te tukanga waikura. Ko te hanganga tino auau o te āhua kōhikohiko - puta ratou i runga i te mata o kowiri tira, waro me steels koranu iti, konumohe, chromium, alloys nika, rino.

tuwhenua Hemispherical hanga rite ki te hua o te whakakāhoretanga isotropic. He rite ki te hiko tenei tukanga. I roto i te wahi whakamārama tenei te raro pīataata o te rawa āhua-porohita. Te nuinga i haria ki taua kinonga, Titanium, konumohe, te konukōreko, me te konukurahina hua, me te te hanganga o te tantalum. Āhua te taua momo he pitting o steels kowiri.

I tua atu, kia polyhedral me faceted pitting. Kei te maha "tuwhenua" o te momo muri ngā ki ia atu, e arata'i ki te whakangaromanga hemispherical nui.

take o

Ko te take matua takanga o pitting waikura ko ki te hanga hangarau me te mahi pūkaha i runga i te rauemi. Ko te mutunga o raruraru i roto i te hangarau whakarewanga whakarewa puta microinclusions momo e whakapōrearea tona hanganga. Ka taea te huaina te whakauru tino noa tauine mira.

Nā ki te mahi mīhini ko te tino maha i runga i te mata o te hua tīmata ki te whakawhanake i pitting. Ko te take mō tenei teka i roto i te whakangaromanga o te kiriata tiaki o runga, ia mutu te hanganga ā-, mahue te mata o te rohe witi. Ko te tukanga tino noa o te whakahohe take ko te pānga hihiri, e arata'i ki te ahua o microcracks.

Pitting waikura o konganuku e whakawhanake tere i runga i ngā mata taratara, me te i raro i te mana o pukuriri pāpāho - te wai moana, rongoā waikawa.

Methods mō te tiaki i whakarewa i te waikura pitting

Hei tiaki i ngā hua whakarewa ki pitting whakamahi e toru ara matua:

1. katia whakakorenga pūnaha mā te whakamahi i ngā rongoā o pūhui kawakore, pūkawa, chromates.
2. Kupu Whakataki o te wāhanga rauemi ki ātete tiketike ki te rusting o te pūwāhi - o molybdenum, chromium, silicon.
3. Whakamahi o pitoake me te hangarau pitoiho te hanga i te apa tiaki.

nga tikanga katoa ki te te tiaki i konganuku i te waikura he hāngai anake ki te hanga o, tono hoki taputapu tiketike-tech me te haumi whakapaipai nui. I roto i te ora ia rā, ko te ki te whakakore rawa i te mōrea o pitting taea. Ka taea e haaparuparu anake te reira i te mana tōraro mahi āhuatanga e:

• tono coatings anticorrosive;
• te whakapai ake i te mahi o taua hua;
• te whakaiti i te taumata o te kawatanga, e kei i te whakapā atu ki te rauemi.

Ko te tikanga whai hua tino me e wātea ana, ko te āta oro ki: te whakaiti i roughness mata, koe wā kotahi faarahi tona resistance waikura. Ko mo hua pai, pai whakamahi o tikanga katoa ki te te tiaki i konganuku ki te waikura i te wa ano.