KR900006550A - Corrosion-resistant aluminum alloy and a product having a gray light-resistant surface prepared therefrom and a method of manufacturing the same - Google Patents

Abstract

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Description

Corrosion-resistant aluminum alloy and a product having a white light-resistant surface produced therefrom and a method of manufacturing the same

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Claims (12)

1.20 to 1.60 wt% iron, 0.25 to 0.55 wt% manganese, 0.05 to 0.25 wt% vanadium, up to 0.20 wt% silicon, up to 0.30 wt% copper, up to 5.0 wt% magnesium, up to 0.10 wt% Consisting of chromium, up to 2.0% by weight of zinc, up to 0.25% by weight of zirconium, up to 0.10% by weight of titanium, up to 0.50% by weight of total impurities, and the remainder of aluminum, with a weight ratio of iron to manganese of 2.8 to 5.0: 1 Aluminum alloy with improved corrosion resistance. The aluminum alloy of claim 1, wherein the vanadium content is 0.10 to 0.20% by weight. The aluminum alloy of claim 1, wherein the iron content is 1.30 to 1.50 wt%, the silicon content is 0.08 wt% or less, and the weight ratio of iron to manganese is between 3.0 and 4.0: 1. The aluminum alloy of claim 2, wherein the iron content is 1.30 to 1.50 wt%, the silicon content is 0.08 wt% or less, and the weight ratio of iron to manganese is between 3.0 and 4.0: 1. An improved process for producing aluminum products having a uniform whiteness in the anodized state, having a light resistant surface and a light reflectance of up to 50%, comprising: (a) 1.20 to 1.6 0% by weight of iron, 0.25 to 0.55% by weight Manganese, 0.05 to 0.35 wt% vanadium, up to 0.20 wt% silicon, up to 0.30 wt% copper, up to 5.0 wt% magnesium, up to 0.1 wt% chromium, up to 2.0 wt% zinc, up to 0.25 wt% Preparing an aluminum alloy consisting of zirconium, up to 0.10 wt% titanium, up to 0.50 wt% total impurities, and the remainder aluminum; and (b) casting the alloy at a temperature of 560 ° C. or less from the casting step to the product step. Processing, wherein the process residence time between 540 and 560 ° C. is 4 hours or less. 6. The method of claim 5 wherein the vanadium content is between 0.10 and 0.20 weight percent. The method of claim 5 wherein the iron content is from 1.30 to 1.50 weight percent, the silicon content is less than 0.08 weight percent, and the weight ratio of iron to manganese is between 3.0 and 4.0: 1. The method of claim 6 wherein the iron content is from 1.30 to 1.50 weight percent, the silicon content is less than 0.08 weight percent, and the weight ratio of iron to manganese is between 3.0 and 4.0: 1. 6. The process of claim 5 comprising the step (c) of anodizing the main alloy in step (b) in an electrolyte. 10. The method of claim 9, comprising anodizing the main alloy using direct current in a sulfuric acid electrolyte comprising 10-25 wt% sulfuric acid and up to 5 wt% carbonic acid. An aluminum product produced by the method according to claim 5. 1.20 to 1.60 wt% iron, 0.25 to 0.55 wt% manganese, 0.05 to 0.25 wt% vanadium, up to 0.20 wt% silicon, up to 0.30 wt% copper, up to 5.0 wt% magnesium, up to 0.10 wt% Anodized, not oxidized, with a chemical composition consisting of chromium, up to 2.0% zinc by weight, up to 0.25% zirconium, up to 0.10% titanium, up to 0.50% total impurities, and the remainder being aluminum. Anodized aluminum alloy having a light reflectance of an oxide layer of the anodized product compared to a non-oxidized product is between 8 and 45% when the oxide layer is 5 to 30 μm thick and 30% or less when the thickness of the oxide layer is about 10 μm. ※ Note: The disclosure is based on the initial application.