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Kukho olu tshintsho kubungakanani obukhulu be-aluminium alloy ngaphambi nasemva kwe-oxidation!?

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Kukho olu tshintsho kubungakanani obukhulu be-aluminium alloy ngaphambi nasemva kwe-oxidation!?

2024-10-18

Umfanekiso we-3.pngUmfanekiso we-4.png

Abantu abaninzi banombuzo: "Kutheni iipores ziba zikhulu emva kwe-oxidation?" Oku kufuneka kuchazwe kumgaqo we-oxidation, i-oxidation ihluke ngokutshiza okanye i-electroplating, i-anodizing iqhutyelwa kumphezulu we-aluminium alloy, yinkqubo yokusabela ukusuka phezulu ukuvelisa ifilimu ye-oxide.

Ngokubanzi, inkqubo yokukhula kwefilimu ye-oxide ibandakanya le miba mibini ilandelayo: (1) inkqubo yokwenziwa kwefilimu (2) inkqubo yokuchithwa kwe-electrochemical yefilimu.

Okwangoku umbane, ioksijini kunye ne-aluminiyam inobudlelwane obukhulu, kwaye i-aluminium substrate ikhawuleza yenza umaleko oxineneyo ongenomqobo, obunzima buxhomekeke kumbane wetanki.

Ngenxa yomthamo omkhulu we-athomu ye-alumina, iyanda, i-barrier layer iba ingalingani, ibangele ukusabalalisa okungalinganiyo kwangoku, ukuchasana okuncinci kwi-concave, i-current enkulu, kunye nechasene ne-convex.

Ukuchithwa kwe-Electrochemical kunye nokuchithwa kweekhemikhali ze-H2SO4 kwenzeka kwisigxina phantsi kwesenzo sentsimi yombane, kwaye i-cavity ngokuthe ngcembe iba ngumngxuma kunye nodonga lomngxuma, kwaye umaleko womqobo udluliselwa kwi-porous layer.

Isinyithi okanye i-alloy isetyenziswe njenge-anode, kwaye ifilimu ye-oxide yenziwe phezu kwayo nge-electrolysis. Ifilimu ye-oxide yensimbi iguqula umgangatho womhlaba kunye nokusebenza, njengombala womphezulu, ukuphucula ukunyanzeliswa kwe-corrosion, ukunyusa ukuxhatshazwa kokugqoka kunye nobunzima, ukukhusela ubuso besinyithi. I-aluminium anodizing, i-aluminium kunye ne-alloy yayo ifakwe kwi-electrolyte ehambelanayo (njenge-asidi ye-sulfuric, i-chromic acid, i-oxalic acid, njl.) njenge-anode, phantsi kweemeko ezithile kunye ne-electrolysis yangoku. I-aluminiyamu ye-anodic okanye i-alloy yayo i-oxidized ukuze yenze umaleko omncinci we-aluminium oxide phezu komhlaba, kunye nobukhulu be-5 ukuya kwi-30 microns, kunye nefilimu enzima ye-anodic oxide inokufikelela kwi-25 ukuya kwi-150 microns.

Umsebenzi wokuqala we-anodizing

Kwinkqubo yokwenza ifilimu ye-oxide, kuyimfuneko ukwenza i-alkali etching kunye nomsebenzi wokupolisha kwinqanaba lokuqala.

I-alkali corrosion yinkqubo yokuphelisa kunye nokulinganisa ifilimu ye-oxide yendalo (AL2O3) kumphezulu we-aluminium. Isantya se-alkali corrosion sixhomekeke kugxininiso kunye nobushushu bebhafu yealkali, exhomekeke ngamandla kwidosi ye-alkali corrosion agent (sodium gluconate) kunye nomxholo we-aluminum ion (AL3+). Umgangatho womphezulu we-aluminiyam, ukuvakala, ukucaba kunye nefilimu ye-oxide electroplating, ukubola kwealkali zonke zidlala indima eqinisekileyo.

Injongo ye-alkali etching kukususa ifilimu ene-oxidized eyenziwe phezu kwendawo ye-aluminium ngokusebenza okushushu okanye phantsi kweemeko zendalo, kunye ne-oyile eseleyo esetyenziswe ngexesha lokuveliswa kobisi kunye nokubumba ukuveliswa. Ingaba lo msebenzi wenziwe ngokucokisekileyo umisela isitshixo kumgangatho wefilimu ye-anodic oxide efunyenweyo. Amanqaku aphambili ekufuneka aqwalaselwe zezi zilandelayo. Yenza ngononophelo umsebenzi wokuhlola phambi kokuhlwa kwealkali, kufunyaniswe ukuba ayilulungelanga unyango lwe-alkali yomhlwa kufuneka ichongwe kwangaphambili. Indlela yonyango ngaphambi kokuba i-alkali ifakwe kufuneka ifaneleke kwaye icokiseke. Lawula iimeko zetekhnoloji yealkali etching operation ngokuchanekileyo.

Kuqhutyelwa kumatshini wokupholisa, iprofayili ye-aluminium ibekwe kwitafile yomsebenzi rhoqo, kwaye umgangatho uchukunyiswa kwaye uxutywe yivili lokupholisa elijikelezayo elijikelezayo, ukwenzela ukuba ubuso bube bushelelezi kwaye buthe tye, kunye nesiphumo sesibuko. iyafezekiswa. Ukupholisha kudla ngokusetyenziswa kwimveliso ukuphelisa i-extrusion streaks, ngoko ikwabizwa ngokuba "ngumatshini wokutshayela" ngeli xesha.

Shwankathela

Utshintsho lwe-aluminium ubungakanani be-alloy lunokukhethwa, kuxhomekeke kwindlela ye-oxidation, ixesha, kunye nenkqubo yonyango lwangaphambili.

Ubungakanani obuncinci: Ngexesha lenkqubo ye-oxidation yonke, kukwayimfuneko ukucwina ingxube ye-aluminium kwisisombululo se-asidi ye-sulfuric, olu luhlu lwemisebenzi luya kubangela ukubola kwe-aluminium alloy, ngoko xa sibona imveliso ye-aluminium alloy kwakhona, ubukhulu bayo buya kuba. incinci ngenxa yomhlwa.

Ubungakanani obukhulu: Ukwenza i-oxidation enzima, unokwenza ubungakanani obupheleleyo be-aluminium alloy bunokwanda okukhulu.

Umgangatho we-alloy aluminium uhlala ubonisa ukwanda okucacileyo.