What is the corrosion rate of aluminium?

What is the corrosion rate of aluminium?

In industrial locations, the corrosion rates average 0.8–0.28 µm/year (0.03–0.11 mils/year). In certain polluted environments, a higher corrosion rate of 13 µm year (0.52 mils/year) was obtained. Table 10.10 shows the corrosion rates of aluminum and selected aluminum alloys in different environments.

Which aluminum alloy is best for corrosion resistance?

Aluminum in its natural state, commercially pure or 1xxx aluminum, has the best corrosion-resistance, but that quality is compromised as alloys, particularly copper and iron but also magnesium or zinc, are added.

How strong is 6063 aluminum?

6063-T6. T6 temper 6063 has an ultimate tensile strength of at least 190 MPa (28,000 psi) and yield strength of at least 160 MPa (23,000 psi). In thicknesses of 3.15 millimetres (0.124 in) or less, it has elongation of 8% or more; in thicker sections, it has elongation of 10%.

What is the corrosion resistance of aluminium?

Aluminium has excellent corrosion resistance because it spontaneously forms a thin but effective oxide layer that prevents further oxidation. And aluminium oxide is impermeable. However, aluminium alloys perform differently in saltwater environments or in a saline atmosphere.

Does aluminium corrode easily?

Because of its highly reactive nature, aluminium always ends up becoming the weaker metal, hence the corrosion. Aluminium corrosion can also occur because of extreme pH levels. High levels of pH can break down the aluminium oxide coating. In this case, the coat is broken down faster than it can repair itself.

How can you prevent aluminum from corroding?

Painting, anodizing or any surface treatment that forms a coating on the aluminium surface will protect the surface from pitting attack. In applications when you want to preserve the aluminium look and still have a surface resistant to pitting, a clear coat or thin anodic coating would be suitable surface treatments.

Is 6063 a marine grade?

Marine grade aluminum 6063 plate 6063 aluminum alloy is mainly used in construction and is also suitable for shipbuilding.

Which aluminum is stronger 6061 or 6063?

AL 6061-T6 has a higher yield strength and fatigue strength when compared to AL-T6 6063. It is also less corrosion resistant than AL 6063.

How can you prevent aluminium corrosion?

What is corrosive to aluminum?

The metals that can cause deposition corrosion of aluminium are referred to as ‘heavy metals’. Some important heavy metals are copper, mercury, tin, nickel, and lead. The corrosion caused by this method is more pronounced in acidic solutions as compared to alkaline solutions.