Anodic oxidation of AI-Cu and Al-Si aluminium alloys

• Autorzy: Tomassi P. , Buczko Z.

Warianty tytułu

PL

Anodowe utlenianie stopów aluminium AI-Cu i Al-Si

• Języki publikacji: EN

Abstrakty

EN

Laboratory tests of anodic oxidation of aluminium alloys were performed with the use of the following materials: AlCu4MgSi, AlSi12Cu3Mg, AlMg5 and for comparison A199,7. Various types of electrolytes were used with direct as well as impulse electric currents. The velocity of the formation of anodic coatings was evaluated. The micro-hardness of coatings were measured. In the case of Al-Cu alloys the velocity of the formation of oxide layers was raised by addition of organic acids to the sulphuric acid solution. The additive Al-1 which was elaborated in the Institute of Precision Mechanics enables to use high anodic current densities. The quality of anodic layers on cast Al-Si alloys is diminished by silicon grains inside oxide coatings. The high velocity of the formation of oxide coatings was obtained by the use of higher sulphuric acid concentration in the solution. The roughness of oxide layers was diminished by the use of impulse current.

PL

Przedstawiono wyniki prób laboratoryjnych anodowego utleniania stopów aluminium zawierających znaczące stężenia dodatków stopowych, w tym miedzi i krzemu. Podłoże stanowiły stopy typu AlCu4MgSi, AlSi12Cu3Mg, AlMg5 i dla porównania A199,7. W procesie anodowego utleniania stosowano roztwory o różnym składzie, prąd .stały lub impulsowy. Badano szybkość wytwarzania powłok tlenkowych i ich mikrotwardość. W przypadku stopów Al-Cu podwyższenie szybkości wytwarzania powłok tlenkowych uzyskano stosując dodatek kwasów organicznych do roztworów kwasu siarkowego. Opracowany w Instytucie Mechaniki Precyzyjnej dodatek Al-1 umożliwia prowadzenie, utleniania w warunkach podwyższonych gęstości prądu anodowego. Przy anodowym utlenianiu stopów odlewniczych zawierających wysokie stężenia krzemu, jakość powłok tlenkowych jest silnie obniżona przez wbudowane w warstwę ziarna krzemu. Zwiększenie szybkości wytwarzania powłok uzyskano, stosując podwyższone stężenia kwasu siarkowego w roztworze. Zastosowanie prądu impulsowego podniosło gładkość otrzymywanych powłok tlenkowych.

Słowa kluczowe

EN

anodic oxidation of aluminium; Al-Cu anodizing; Al-Si anodizing

PL

anodowe utlenianie aluminium; anodowanie Al-Cu; anodowanie Al-Si

• Wydawca: Sieć Badawcza Łukasiewicz – Instytut Mechaniki Precyzyjnej
• Czasopismo: Inżynieria Powierzchni
• Rocznik: 2015
• Tom: nr 3
• Strony: 48--55
• Opis fizyczny: Bibliogr. 38 poz., rys., tab.

Twórcy

autor

Tomassi P.

• Instytut Mechaniki Precyzyjnej, Warszawa

autor

Buczko Z.

• Instytut Mechaniki Precyzyjnej, Warszawa

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