Kukhona lezi zinguquko kusayizi omkhulu we-aluminium alloy ngaphambi nangemva kwe-oxidation!?

Abantu abaningi banombuzo: "Kungani ama-pores eba makhulu ngemva kwe-oxidation?" Lokhu kufanele kuchazwe kusukela kumgomo we-oxidation, i-oxidation ihlukile ekufutheni noma i-electroplating, i-anodizing yenziwa ebusweni be-aluminium alloy, kuyinkqubo yokusabela okuvela phezulu ukuze kukhiqize ifilimu ye-oxide.

Ngokuvamile, inqubo yokukhula kwefilimu ye-oxide ihlanganisa izici ezimbili ezilandelayo: (1) inqubo yokwakheka kwefilimu (2) inqubo yokuchithwa kwe-electrochemical yefilimu.

Okwamanje kagesi, i-oksijini ne-aluminium kunokuhlobana okukhulu, futhi i-aluminium substrate yakha ngokushesha ungqimba oluminyene lwesithiyo olungenambobo, ukuqina kwalo kuncike ku-voltage yethangi.

Ngenxa yomthamo omkhulu wama-athomu we-alumina, uyakhula, ungqimba lwesithiyo luba nokungalingani, okuholela ekusabalaliseni kwamanje okungalingani, ukumelana okuncane ku-concave, yamanje enkulu, kanye nokuphambene ne-convex.

Ukuqedwa kwe-Electrochemical kanye nokuqedwa kwamakhemikhali e-H2SO4 kwenzeka emgodini ngaphansi kwesenzo sensimu kagesi, futhi i-cavity kancane kancane iba umgodi nodonga lwembobo, futhi isendlalelo sokuvimbela sidluliselwa kungqimba olunezimbotshana.

Insimbi noma i-alloy isetshenziswa njenge-anode, futhi ifilimu ye-oxide yakheka ebusweni bayo nge-electrolysis. Ifilimu ye-metal oxide ishintsha isimo esingaphezulu nokusebenza, njengombala ongaphezulu, ukuthuthukisa ukumelana nokugqwala, ithuthukisa ukumelana nokugqokwa nobulukhuni, ivikela ingaphezulu lensimbi. I-Aluminium anodizing, i-aluminium ne-alloy yayo ifakwe ku-electrolyte ehambisanayo (njenge-sulfuric acid, i-chromic acid, i-oxalic acid, njll.) njenge-anode, ngaphansi kwezimo ezithile kanye namanje okuhlaba umxhwele, i-electrolysis. I-aluminiyamu ye-anodic noma i-alloy yayo i-oxidized ukuze yakhe ungqimba oluncane lwe-aluminium oxide ebusweni, enogqinsi lwama-microns angu-5 kuya kwangu-30, futhi ifilimu ye-anodic oxide eqinile ingafinyelela kuma-microns angu-25 kuya kwangu-150.

Umsebenzi wokuqala we-anodizing

Enqubweni yokwenza ifilimu ye-oxide, kuyadingeka ukwenza umsebenzi we-alkali etching kanye nokupholisha ekuqaleni.

Ukugqwala kwe-alkali kuyinqubo yokuqeda nokulinganisa ifilimu yemvelo ye-oxide (AL2O3) ebusweni be-aluminium. Isivinini sokugqwala kwe-alkali sincike ekugxilweni nasekushiseni kokugeza kwe-alkali, okuncike kakhulu kumthamo we-alkali corrosion agent (i-sodium gluconate) nokuqukethwe kwama-ion e-aluminium (AL3+). Ikhwalithi yendawo ye-aluminium, umuzwa, flatness kanye nefilimu ye-oxide electroplating, ukugqwala kwe-alkali konke kudlala indima ebalulekile.

Inhloso ye-alkali etching ukususa ifilimu ene-oxidized eyakhiwe phezu kwezingxenye ze-aluminium ngokusebenza okushisayo noma ngaphansi kwezimo zemvelo, kanye namafutha ayinsalela asetshenziswa ngesikhathi sokukhiqiza ubisi nokubumba ukukhiqiza. Ukuthi lo msebenzi wenziwa kahle yini unquma ukhiye wekhwalithi yefilimu ye-anodic oxide etholiwe. Amaphuzu abalulekile okumele uwanake yilawa alandelayo. Yenza umsebenzi omuhle wokuhlola ngokucophelela ngaphambi kokugqwala kwe-alkali, kutholwe ukuthi akufaneleki ukwelashwa kokugqwala kwe-alkali kufanele kukhethwe kusenesikhathi. Indlela yokwelapha ngaphambi kokufakwa kwe-alkali kufanele ifaneleke futhi iphelele. Bazi kahle izimo zobuchwepheshe bokusebenza kwe-alkali etching ngendlela efanele.

Kwenziwa emshinini wokupholisha, iphrofayili ye-aluminium ibekwe etafuleni lomsebenzi njalo, futhi ubuso buthintwa futhi buhlikihlwe yisondo lokupholisha eligijima ngesivinini esikhulu, ukuze ubuso busheleleke futhi buthule, ngisho nomphumela wesibuko. kuyazuzwa. Ukupholisha kuvame ukusetshenziswa ekukhiqizeni ukuze kuqedwe ama-extrusion streaks, ngakho-ke kubizwa nangokuthi "i-mechanical sweep" ngalesi sikhathi.

Fingqa

Ukushintshwa kosayizi we-aluminium alloy kungakhethwa, kuye ngokuthi indlela ye-oxidation, isikhathi, kanye nenqubo yokwelashwa kwangaphambili.

Usayizi omncane: Phakathi nayo yonke inqubo ye-oxidation, kuyadingeka futhi ukucwilisa ingxube ye-aluminium esixazululweni se-sulfuric acid, lolu chungechunge lwemisebenzi luzodala ukugqwala kwe-aluminium alloy, ngakho-ke uma sibona umkhiqizo we-aluminium alloy futhi, ubukhulu bayo buzoba. ezincane ngenxa yokugqwala.

Usayizi omkhulu: Ukwenza i-oxidation eqinile, ungenza usayizi we-aluminium alloy ukhule kakhulu.

Izinga le-aluminium alloy livame ukubonisa ukwanda okusobala.