Olee otú iji gbochie corrosion nke ígwè Ọdịdị?
Site na mmụba na-aga n'ihu nke mmepụta ígwè, ihe owuwu ígwè na-ewu ewu karị.Ọ na-ọtụtụ-eji dị ka nkwakọba, ogbako, ụgbọala, prefab ulo, ịzụ ahịa nnukwu ụlọ, prefab stadium,etc.Tụnyere mesikwuru ihe ụlọ, ígwè Ọdịdị ụlọ nwere uru nke adaba ewu, ezi seismic arụmọrụ, obere gburugburu ebe obibi mmetọ na recyclability.Otú ọ dị, ihe owuwu ígwè dị mfe nchara, ya mere mgbochi corrosion dị ezigbo mkpa maka ụlọ ígwè.
Ụdị nchara nke ụlọ nchara gụnyere ikuku ikuku, corrosion mpaghara na corrosion nrụgide.
(1) ikuku corrosion
A na-ebute mbibi ikuku nke ụlọ nchara n'ụzọ bụ isi site na kemịkalụ na mmetụta electrochemical nke mmiri na oxygen na ikuku.Uzuzu mmiri dị na mbara igwe na-etolite akwa electrolyte n'elu igwe, na ikuku oxygen na-agbaze n'ime ya dị ka cathode depolarizer.Ha na-etolite cell galvanic na-emebi emebi nke nwere ihe nchara.Mgbe emechara oyi akwa nchara n'elu ndị otu nchara site na corrosion ikuku, ngwaahịa corrosion ga-emetụta mmeghachi omume electrode nke corrosion ikuku.
(2) nrụrụ mpaghara
Nrụrụ ime obodo bụ nke a na-ahụkarị na ụlọ arụrụ arụ nchara, ọkachasị corrosion galvanic na corrosion crevice.Galvanic corrosion na-emekarị na nchikota igwe dị iche iche ma ọ bụ njikọ nke ụlọ nchara.Igwe ahụ nwere ikike na-adịghị mma na-emebi ngwa ngwa, ebe a na-echekwa ígwè nwere ikike dị mma.Ọla abụọ ahụ mejupụtara cell galvanic na-emebi emebi.
Crevice corrosion na-abụkarị n'elu crevices n'etiti dị iche iche structural òtù nke ígwè Ọdịdị na n'etiti ígwè òtù na ndị na-abụghị metal.Mgbe crevice obosara nwere ike ime ka mmiri mmiri stagnate na crevice, kasị mmetụta crevice obosara nke ígwè Ọdịdị crevice corrosion bụ 0.025 ~ o.1mm.
(3) Nchegbu corrosion
N'ebe a kapịrị ọnụ, nchara ígwè ahụ nwere ntakịrị ihe na-emebi emebi mgbe ọ na-adịghị na ya, ma mgbe a na-etinye ya n'ahụ ike, akụkụ ahụ ga-agbaji na mberede mgbe oge ụfọdụ gasịrị.Ebe ọ bụ na ọ dịghị ihe àmà doro anya nke mgbawa nrụrụ nrụrụ aka tupu oge eruo, ọ na-ebutekarị ọdachi, dị ka ndakpọ àkwà mmiri, ntapu pipeline, ndakpọ ụlọ na ihe ndị ọzọ.
Dị ka usoro corrosion nke nhazi ígwè si dị, nrụrụ ya bụ ụdị mmebi na-enweghị isi, na corrosion na-etolite ngwa ngwa.Ozugbo elu nke ihe owuwu ígwè na-emebi emebi, olulu corrosion ga-etolite ngwa ngwa site na olulu ala ruo omimi, na-akpata nrụgide nrụgide nke nhazi ígwè, nke ga-eme ka mmebi nke ígwè dị ngwa ngwa, nke bụ ajọ gburugburu.
Nrụrụaka na-ebelata nrụrụ oyi na ike ike ọgwụgwụ nke ígwè, na-ebute mgbaji na mberede nke ihe ndị na-ebu ibu na-enweghị ihe ịrịba ama doro anya nke nrụrụ, na-ebute ọdịda nke ụlọ.
Usoro nchebe nke ihe owuwu ígwè corrosion
1. Jiri ígwè na-eguzogide ihu igwe
Low alloy ígwè usoro n'etiti nkịtị ígwè na igwe anaghị agba nchara.A na-eji ígwè carbon nkịtị mee igwe ihu igwe nwere obere ihe na-eguzogide corrosion dị ka ọla kọpa na nickel.Ọ nwere njirimara nke ike na ike siri ike, mgbatị plastik, ịmepụta, ịgbado ọkụ na ịkpụ, abrasion, okpomọkụ dị elu na ike ọgwụgwụ nke ígwè dị elu;Mgbochi ihu igwe bụ 2 ~ 8 ugboro nke carbon ígwè nkịtị, na mkpuchi mkpuchi bụ 1.5 ~ 10 ugboro nke carbon ígwè nkịtị.N'otu oge ahụ, o nwere àgwà nke nchara na-eguzogide, corrosion eguzogide nke components, ndụ ndọtị, thinning na oriri mbelata, ọrụ ịzọpụta na ike ịzọpụta.A na-ejikarị igwe igwe eme ihe maka ihe owuwu ígwè ekpughere na mbara igwe ruo ogologo oge, dị ka ụzọ ụgbọ oloko, ụgbọ ala, àkwà mmiri, ụlọ elu na ihe ndị ọzọ.A na-eji ya emepụta arịa, ụgbọ ala ụgbọ oloko, mmanụ mmanụ, ụlọ ọdụ ụgbọ mmiri, ikpo okwu mmepụta mmanụ na arịa nwere hydrogen sulfide corrosive media na kemịkalụ na mmanụ mmanụ.Mmetụta ike ya dị ala dị ala dịkwa mma karịa nke nchara nhazi n'ozuzu ya.Ọkọlọtọ bụ igwe na-ekpuchi ihu igwe maka ụlọ welded (GB4172-84).
The amorphous spinel oxide oyi akwa banyere 5O ~ 100 m oké kpụrụ n'etiti nchara oyi akwa na matriks bụ ok na nwere ezi adhesion na matrix metal.N'ihi ịdị adị nke nnukwu ihe nkiri oxide a, ọ na-egbochi ntinye nke ikuku oxygen na mmiri na ikuku n'ime matrix ígwè, na-ebelata ọganihu dị omimi nke corrosion na ihe ígwè, ma na-eme ka ikuku corrosion na-eguzogide nke ígwè ihe.
2. Hot itinye galvanizing
Hot itinye galvanizing corrosion mgbochi bụ mikpuo na workpiece na-plated n'ime gbazee metal zinc bath maka plating, nke mere na-etolite a dị ọcha zinc mkpuchi n'elu nke workpiece na a zinc alloy mkpuchi na nke abụọ elu, nke mere na-aghọta. nchebe nke ígwè na ígwè.
3. Arc spraying anticorrosion
Akụ spraying bụ iji pụrụ iche spraying akụrụngwa gbazee na sprayed metal waya n'okpuru omume nke obere voltaji na elu ugbu a, wee fesa ya na metal components pre sanded na derusted site abịakọrọ ikuku na-etolite arc sprayed zinc na aluminum coatings, nke bụ. fesaa ya na mkpuchi mkpuchi mgbochi corrosion iji mepụta mkpuchi ihe mgbochi corrosion ogologo oge.Ihe mkpuchi nke siri ike nwere ike igbochi ihe na-emebi emebi ịbanye n'ime mkpụrụ.
Ihe e ji mara arc spraying mgbochi corrosion bụ: mkpuchi nwere nnukwu nrapado, na nrapado ya enweghị atụ site na zinc bara ụba agba na zinc na-ekpo ọkụ.The results nke mmetụta ekwe ule na workpiece na-emeso na arc spraying mgbochi corrosion ọgwụgwọ bụghị nanị n'ụzọ zuru ezu izute mkpa ụkpụrụ, ma mara dị ka "laminated ígwè efere";Oge mgbochi corrosion nke arc spraying mkpuchi dị ogologo, n'ozuzu 30 ~ 60A, na mkpuchi mkpuchi na-ekpebi ndụ mgbochi corrosion nke mkpuchi.
4. Mgbochi corrosion nke thermal sprayed aluminum (zinc) mkpuchi ihe mejupụtara
Thermal spraying aluminum (zinc) mejupụtara mkpuchi bụ ogologo oge mgbochi corrosion usoro na otu mmetụta dị ka ọkụ-mikpu galvanizing.Usoro bụ iji wepụ nchara n'elu nke ígwè ígwè site na ájá na-agbawa agbawa, nke mere na elu na-ekpughe na dara luster na roughened;Mgbe ahụ, jiri acetylene oxygen ire ọkụ gbazee aluminom (zinc) waya na-aga n'ihu zitere na ịfụ ya n'elu ígwè òtù na abịakọrọ ikuku na-etolite a mmanụ aṅụ aluminum (zinc) spraying oyi akwa (ọkpụrụkpụ banyere 80 ~ 100m);N'ikpeazụ, pores na-ejupụta na epoxy resin ma ọ bụ neoprene agba iji mepụta mkpuchi ihe mejupụtara.Aluminom fesa thermal (zinc) ihe mkpuchi mejupụtara enweghị ike itinye ya na mgbidi dị n'ime nke ndị otu tubular.Ya mere, a ga-emechi nsọtụ abụọ nke ndị otu tubular ikuku ka ọ ghara imebi na mgbidi dị n'ime.
Uru nke usoro a bụ na ọ nwere ike ime mgbanwe na nha nke components, na ọdịdị na nha nke ihe ndị dị na ya fọrọ nke nta ka ọ bụrụ na-akparaghị ókè;Uru ọzọ bụ na mmetụta okpomọkụ nke usoro ahụ bụ mpaghara, ya mere ihe ndị ahụ agaghị emepụta nrụrụ okpomọkụ.Tụnyere na-ekpo ọkụ-mikpu galvanizing, mmepụta ogo nke thermal spraying aluminum (zinc) mejupụtara mkpuchi dị ala, ọrụ ike nke ájá blasting na aluminum (zinc) spraying dị elu, na àgwà na-adịkwa mfe mmetụta mgbanwe mmetụta uche nke ndị ọrụ. .
5. mkpuchi anticorrosion
Ihe mkpuchi mgbochi corrosion nke ihe owuwu ígwè chọrọ usoro abụọ: usoro ọgwụgwọ na ihe mkpuchi.Nzube nke isi N'ezie ọgwụgwọ bụ iwepu burr, nchara, mmanụ unyi na ndị ọzọ Mgbakwụnye n'elu nke components, ka ikpughe dara luster n'elu nke components;Ka usoro ọgwụgwọ ahụ dịkwuo mma, ọ ka mma mmetụta adhesion.Ụzọ ọgwụgwọ ndị bụ isi gụnyere ọgwụgwọ ntuziaka na n'ibu, ọgwụgwọ kemịkalụ, ọgwụgwọ ịgbasa igwe, wdg.
Banyere ihe owuwu mkpuchi, ụzọ ịsa ahịhịa ndị a na-ejikarị gụnyere usoro ịhịa aka n'aka, usoro ntụgharị akwụkwọ ntuziaka, usoro ntinye mkpuchi, usoro ịgba ikuku na usoro ịgbasa ikuku.Usoro ịsa ahịhịa nwere ezi uche nwere ike hụ na ịdị mma, ọganihu, chekwaa ihe ma belata ọnụ ahịa.
N'ihe gbasara nhazi mkpuchi, e nwere ụdị atọ: primer, ọkara agba, primer, primer na primer.The primer tumadi na-arụ ọrụ nke adhesion na mgbochi nchara;The topcoat tumadi na-arụ ọrụ nke mgbochi corrosion na mgbochi ịka nká;Ọrụ nke agba agba dị n'etiti primer na imecha, ma nwee ike ịbawanye ọkpụrụkpụ ihe nkiri.
Naanị mgbe a na-eji primer, uwe etiti na uwe elu na-emekọ ihe ọnụ nwere ike ịrụ ọrụ kachasị mma ma nweta mmetụta kachasị mma.
Oge nzipu: Mar-29-2022