Nūhou

ʻO ke kumu e koho ai mākou i ka alumini no ka hoʻonani ʻana no ka mea ʻoi aku ka paʻa o kona ʻano, a he kūpaʻa ka corrosion i ka hoʻohana lōʻihi.Eia nō naʻe, e loaʻa ka corrosion i kekahi mau profile aluminika ma ka ʻili, ʻo ia ka mea ma muli o ka hana ʻana i nā mea waiwai i ka wā o ka hana ʻana.

1. Ma ke kaʻina hana o ka hoʻolei ʻana, ʻaʻole kūpono ka hapa o ka magnesium a me ke silika, e like me ke ola ʻana o kekahi silicon keu, kahi liʻiliʻi o ke silikoni i kahi kūlana manuahi, e hana i nā pūhui ternary i ka alumini alumini i ka manawa like. .ʻO kēia mau ʻāpana haumia insoluble a i ʻole nā ​​​​mea haumia manuahi i hoʻokumu ʻia i loko o ka alloy e hōʻuluʻulu i ka palena o ka palaoa, a nāwaliwali i ka ikaika a me ka paʻakikī o ka palena palaoa i ka manawa like, e lilo i loulou nāwaliwali loa o ka pale ʻana i ka corrosion, a hoʻomaka ka corrosion mai laila.

2. Ma ke kaʻina hana o ka hoʻoheheʻe ʻana, ʻoiai ʻo ka hapa o ka magnesium a me ke silika i loko o ka maʻamau, akā i kekahi manawa ma muli o ka hui ʻole ʻana a me ka maikaʻi ʻole, ka hopena i ka hāʻawi ʻole ʻana o ke silikoni i ka heheʻe, aia nā wahi waiwai a me nā wahi ʻilihune.ʻO kahi liʻiliʻi o ka silikoni manuahi i loko o ka matrix alumini ʻaʻole e hōʻemi wale i ke kūpaʻa corrosion o ka alloy, akā e hōʻemi pū hoʻi i ka nui o ka palaoa.

3. ʻO ka mana o nā ʻano ʻenehana like ʻole i ka wā extrusion, e like me ke kiʻekiʻe o ka mahana preheating bar, ke kahe kahe o ka metala extrusion, ka ikaika hoʻoluʻu o ka ea i ka wā extrusion, ka mahana ʻelemakule a me ka manawa paʻa a me nā mana kūpono ʻole e maʻalahi e hana i ka hoʻokaʻawale silika a ka hoʻokaʻawale ʻana, i lilo ʻole ai ka magnesium a me ke silikona i Mg2Si, loaʻa kekahi kilika manuahi.
I ka pōkole, inā maʻalahi ka ʻili o ka ʻaoʻao alumini i ka hoʻohana ʻana, no ka mea ʻoi aku ka haʻahaʻa o ke kūlana maikaʻi o ka ʻaoʻao alumini i ka hana ʻana, no laila pono mākou e ʻimi i kahi mea hana ʻoihana i ke koho ʻana i ka profile alumini, no laila ke ʻano alumini ʻoe. koho e ʻoi aku ka palekana.