1) Nhazi ule ịgba nnu
Nnwale ịgba nnu bụ iji kemịkal mee ka ihe na-eme corrosion dị na gburugburu ebe obibi wee chọpụta nguzogide corrosion nke ihe ma ọ bụ ngwaahịa.Dị ka ọnọdụ ule dị iche iche si dị, a na-ekewa ule ịgba nnu n'ụdị anọ: nnwale ịgba nnu nnu na-anọpụ iche, ule ịgba nnu acidic, ule ịgba nnu ọla kọpa accelerated na nnwale ịgba nnu ọzọ.
1.Neutral Salt Spray Test (NSS) bụ ụzọ nnwale corrosion nke izizi na nke kachasị eji.Nnwale ahụ na-eji 5% sodium chloride saline solution, PH uru na-agbanwe na nso nso (6-7), ule okpomọkụ bụ 35 ℃, chọrọ nke nnu ịgba mmezi ọnụego n'etiti 1-2ml / 80cm2.h.
A na-emepụta 2.Acid Salt Spray Test (ASS) na ndabere nke nnwale ịgba nnu na-anọpụ iche.Nnwale ahụ na-agbakwụnye glacial acetic acid na 5% sodium chloride solution, nke na-ebelata pH uru nke ngwọta ihe dị ka 3. Ngwọta ahụ na-aghọ acidic, na nnu nnu na-emepụta na njedebe na-aghọkwa acidic site na nnu nnu na-anọpụ iche.Ọnụego nrụrụ ya dị ihe dị ka okpukpu atọ karịa nke ule NSS.
3.Copper ion accelerated salt spray test (CASS) bụ ọhụrụ mepụtara mba ọzọ ngwa ngwa ịgbasa corrosion ule.Nnwale ule bụ 50 ℃, na obere ego nke nnu ọla kọpa - ọla kọpa chloride na-agbakwunyere na ngwọta nnu, nke na-eme ka corrosion siri ike, na ọnụ ọgụgụ corrosion ya dị ihe dị ka okpukpu 8 karịa nke ule NSS.
4.Alternating nnu ịgba ule bụ a keukwu nnu ịgba ule, nke bụ n'ezie ihe ọzọ nke na-anọpụ iche nnu ịgba ule, keguru okpomọkụ ule na ndị ọzọ ule.A na-ejikarị ya eme ihe maka ngwaahịa dum nke ụdị oghere, site na ntinye nke gburugburu iru mmiri, nke mere na ọ bụghị nanị na a na-emepụta corrosion nnu nnu n'elu ngwaahịa ahụ, kamakwa n'ime ngwaahịa ahụ.Ọ bụ ngwaahịa dị na nnu nnu, okpomọkụ iru mmiri na ọnọdụ gburugburu ebe obibi ndị ọzọ na-agbanwe agbanwe, na n'ikpeazụ nyochaa eletriki na ígwè ọrụ nke ngwaahịa dum na ma ọ bụ na-enweghị mgbanwe.
Nke a dị n'elu bụ nkọwa zuru ezu na nhazi ọkwa anọ nke ule ịgba nnu na njirimara ya.Na ngwa bara uru, a ga-ahọrọ usoro nyocha ịgba mmiri kwesịrị ekwesị dịka njirimara nke ngwaahịa na ebumnuche nke ule ahụ.
Tebụl 1 na-ezo aka na GB/T10125-2021 "Nnwale ikuku ikuku na-eme ihe nlere nnu nnu" na ihe ndị yiri ya na-enye ntụnyere nke ule ịgba mmiri nnu anọ.
Tebụl 1 Ndepụta atụnyere nnwale ịgba nnu anọ
| Usoro ule | NSS | ASỊ | CASS | Nnwale ịgba nnu ọzọ |
| Okpomọkụ | 35°C±2°℃ | 35°C±2°℃ | 50°C±2°℃ | 35°C±2°℃ |
| Nkezi ọnụego ndozi maka mpaghara kwụ ọtọ nke 80㎡ | 1.5ml / h ± 0.5mL / h | |||
| Ntinye uche nke ngwọta NaCl | 50g/L±5g/L | |||
| PH uru | 6.5-7.2 | 3.1-3.3 | 3.1-3.3 | 6.5-7.2 |
| Oke ngwa | Ọla na alloys, mkpuchi igwe, ihe nkiri ntụgharị, ihe nkiri anodic oxide, ihe mkpuchi organic na mkpụrụ ọla. | Ọla kọpa + Nickel + Chromium ma ọ bụ Nickel + Chromium ihe eji achọ mma, mkpuchi anodic oxide na mkpuchi organic na aluminom. | Ọla kọpa + Nickel + Chromium ma ọ bụ Nickel + Chromium ihe eji achọ mma, mkpuchi anodic oxide na mkpuchi organic na aluminom. | Ọla na alloys, mkpuchi igwe, ihe nkiri ntụgharị, ihe nkiri anodic oxide, ihe mkpuchi organic na mkpụrụ ọla. |
2) Nnwale ịgba nnu nnu ikpe
Nnwale ịgba nnu bụ ụzọ nnwale corrosion dị mkpa, nke a na-eji na-enyocha nguzogide corrosion nke ihe dị na gburugburu ebe ịgba nnu.Nsonaazụ nke usoro mkpebi ahụ gụnyere usoro mkpebi ọkwa, usoro nleba anya, usoro njiri mara ọdịdị ihe na-emebi emebi na usoro nyocha ndekọ ọnụ ọgụgụ corrosion data.
1. Usoro ikpe nke ọkwa bụ site n'ịtụle nha nke mpaghara corrosion na mkpokọta mpaghara, a na-ekewa ihe nlele ahụ na ọkwa dị iche iche, yana ọkwa dị iche iche dịka ntọala maka ikpe ruru eru.Usoro a na-adabara maka nleba anya nke ihe atụ dị larịị, ọ pụkwara iji anya ya gosipụta ogo corrosion nke ihe nlele ahụ.
2. Ịtụle usoro ikpe bụ site na ịdị arọ nke ihe nlele tupu na mgbe ị na-atụle ule corrosion, gbakọọ ịdị arọ nke ọnwụ corrosion, ka ị na-ekpe ikpe nke nguzogide corrosion nke ihe nlele ahụ.Usoro a dabara adaba maka ntule nguzogide nbibi nke igwe, nwere ike nyochaa n'ụzọ dị iche iche ogo corrosion nke ihe nlele ahụ.
3. The corrosive ọdịdị nke mkpebi siri ike bụ usoro qualitative mkpebi siri ike, site na nlele nke nnu ịgba corrosion sample samples ma na-emepụta corrosion phenomen iji chọpụta.Usoro a dị mfe na nghọta, ya mere a na-eji ya eme ihe na ụkpụrụ ngwaahịa.
4. Nyocha ndekọ ọnụ ọgụgụ nke data corrosion na-enye usoro maka ịmepụta ule corrosion, nyochaa data corrosion na ikpebi ọkwa ntụkwasị obi nke data corrosion.A na-ejikarị ya nyocha, corrosion ọnụ ọgụgụ, karịa kpọmkwem maka mkpebi siri ike nke ngwaahịa.Usoro a nwere ike ịhazi na nyochaa nnukwu data corrosion iji nweta nkwubi okwu ziri ezi na nke a pụrụ ịdabere na ya.
Na nchịkọta, ụzọ mkpebi siri ike nke ule ịgba mmiri nnu nwere njirimara nke ha na njedebe nke ngwa, na usoro kwesịrị ekwesị kwesịrị ịhọrọ maka mkpebi siri ike dịka mkpa dị iche iche.Ụzọ ndị a na-enye ntọala dị mkpa na ụzọ maka nyochaa nguzogide corrosion nke ihe.
Oge nzipu: Mar-01-2024