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Anonymous users2024-01-24There are two possibilities.
Clause. 1. It itself is a black aluminum alloy window, and its black color is electroplating (oxidation), not paint spraying, and will not fade. This is indeed a relatively good material.
Clause. Second, aluminum is easy to oxidize with the oxygen in the air, aluminum alloy contains magnesium, etc., other metals, it is also easy to react with the oxygen in the air, in short, the color change of the surface of the aluminum alloy is partly the result of oxidation, on the other hand, it is caused by the change of the surrounding environment where you live, for example, there are factories around, the pH of the air, changes. In a word, it is caused by oxidation reactions. Or the mismatch of the pH value of the cutting fluid during machining will also cause chemical reaction or oxidation.
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Anonymous users2024-01-23You can reapply it on the outside with paint.
Whether it is the installation of anti-theft windows or anti-theft nets, we must first determine the type of balcony of our own home, as well as the opening direction of the window, if it is an inward window or a casement window, you can choose an anti-theft net or an anti-theft window, if it is an outward window, you can only choose an anti-theft window, so as to open the window, when both can be selected, the aesthetics, practicality, security considerations of the anti-theft net will be more comprehensive.
Of course, it is legal, that is, some residential properties are not allowed to be installed because the façade should be unified. Pretending not to break the law.
Is it the government that is the one who told you that the fine is from the government? In the past, there were a lot of bay window security nets, but now they are not used, maybe this does not match the appearance of your entire building. In fact, it is not considered to change the structure of the house, and the structure of the house generally refers to the internal structure.
How many thieves do you have there?
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