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FAQ

Indeed, traffic signs can be manufactured with aluminum sheets. The durability, lightweight nature, and resistance to corrosion that aluminum offers make it a favored option for traffic signs. These attributes enable the signs to endure diverse weather conditions and guarantee a prolonged lifespan. Furthermore, aluminum sheets lend themselves easily to being shaped into various sizes and designs, thus facilitating the creation of personalized traffic signs. All in all, opting for aluminum sheets in the production of traffic signs is a dependable and effective decision.

With a project I'm working on, I need to reinforce a small case made of aluminium. My options are to use regular old screws (probably steel) or Stainless Steel screws (much more costly). Just wondering what corrosion will be like? *It will never ever get wet,* so does that mean corrosion will not occur? (to a certain degree, obviously) And would corrosion, since its dry, still be affected by the type of metal used for the screws? The screws need to be strong, and they also need to be purchase-able at a regular hardware store, as I'm not going to go buying just screws on-line. Thanks for any info you can provide.

You don't mention just what this project is, but 'regular' screws in the aluminum will not 'rust' - but they may cause galvanic action (a white powdery aluminum oxide may form over time.) Most hardware stores carry aluminum screws, why not just buy and use them if you are concerned? They are usually used for aluminum replacement windows and may be painted white. You can use sandpaper to remove the paint if you want the silver to show.

Trying to find the best aluminum powder I can buy for rocket engines and pyrotechnic (fireworks) uses?

It really depends on your formula and how the aluminum is being used in the formula. Is it a part of the fuel or is an additive to the fuel for sparks?

Yes, aluminum sheet can be used for decorative purposes. Aluminum is a versatile material that can be easily shaped, cut, and formed into various designs, making it ideal for decorative applications. It can be used to create decorative panels, sculptures, signage, furniture, and many other decorative elements. Additionally, aluminum can be anodized or painted in a wide range of colors, allowing for further customization and enhancing its aesthetic appeal. Its lightweight nature and resistance to corrosion also make it a practical choice for both indoor and outdoor decorative purposes.

Yes, aluminum sheets can be used for balcony railings. Aluminum is a lightweight and durable material that is commonly used for this purpose due to its resistance to rust and corrosion. Additionally, aluminum can be easily shaped and customized to meet specific design requirements, making it a popular choice for balcony railings.

Yes, aluminum sheets can be used for elevator interiors. Aluminum is a commonly used material in elevator construction due to its durability, lightweight nature, and aesthetic appeal. It provides a sleek and modern look to elevator interiors while also offering high resistance to corrosion and wear.

Indeed, air ducts can utilize aluminum sheets. Aluminum, known for its lightweight and durable characteristics, is frequently employed in air ducts. Its resistance to corrosion renders it a suitable option for HVAC systems. Air ducts are often constructed using aluminum sheets due to their malleability, enabling easy bending and shaping to meet specific dimensions. Moreover, aluminum boasts commendable thermal conductivity, ensuring efficient heat transfer within the ducts. Ultimately, opting for aluminum sheets in air ducts proves to be a pragmatic and efficient decision.

I have a problem when machining aluminium in my machine shop. There are times when the machines aluminium surface turns yellowish (somtimes brown). I do not know what is the main cause of the problem. Is it due to the coolant used?

Aluminum oxides may appear in different colors depending on hydration states and other variables. Look in a CRC Handbook of Chemistry Physics if available for aluminum compounds and their colors. The colors that you see may also have as much to do with the surface finish as the color of the material on the surface. A microscopically rough surface will appear dark next to a polished surface due to light scattering. I will agree with Ling in principle, but not on details. EDS detection limits on homogeneous samples can be better than 0.1%, although not so good for elements at the light end of the detection range. Current detectors can detect chlorine (a common culprit for aluminum discoloration) at about 0.1%. Your problem with detection and one that Ling has addressed previously may be that a thin film of contamination would not be easily detected by EDS. As Ling suggests, SIMS is a good technique for detecting thin films and low concentrations. The problem with SIMS in this case may be that the detection limits are too good and the technique cannot be quantified. SIMS would detect 2 ppm of chloride and you couldn't tell for sure whether it was 2 ppm, which is probably not an issue here, or 2000 ppm, which would be significant. I would suggest x-ray photoelectron spectroscopy (ESCA or XPS) as an alternative for further study. The technique will analyze thin films (20 A) and detection limits are good enough (about 0.1%). In addition, XPS will give you information about the compounds present, e.g. whether the oxygen is aluminum oxide, aluminum hydroxide, etc. Good Luck.