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  2. Galvanic corrosion - Wikipedia

    en.wikipedia.org/wiki/Galvanic_corrosion

    The paste consists of a lower nobility metal than aluminium or copper. Choose metals that have similar electropotentials. The more closely matched the individual potentials, the smaller the potential difference and hence the smaller the galvanic current. Using the same metal for all construction is the easiest way of matching potentials.

  3. Galling - Wikipedia

    en.wikipedia.org/wiki/Galling

    Sheet metal forming, thread manufacturing, and other industrial operations may include moving parts, or contact surfaces made of stainless steel, aluminium, titanium, and other metals whose natural development of an external oxide layer through passivation increases their corrosion resistance but renders them particularly susceptible to galling.

  4. AlGa - Wikipedia

    en.wikipedia.org/wiki/AlGa

    The resulting alloy is very weak and brittle, being broken under the most minute pressure. The alloy is also chemically weaker, as the gallium inhibits the aluminum from forming a protective oxide layer. A video of gallium metal causing intergrain corrosion and breaking of aluminum can be found here. [1]

  5. Stress corrosion cracking - Wikipedia

    en.wikipedia.org/wiki/Stress_corrosion_cracking

    Stress corrosion cracking (SCC) is the growth of crack formation in a corrosive environment. It can lead to unexpected and sudden failure of normally ductile metal alloys subjected to a tensile stress, especially at elevated temperature. SCC is highly chemically specific in that certain alloys are likely to undergo SCC only when exposed to a ...

  6. Corrosion - Wikipedia

    en.wikipedia.org/wiki/Corrosion

    Galvanic corrosion of an aluminium plate occurred when the plate was connected to a mild steel structural support.. Galvanic corrosion occurs when two different metals have physical or electrical contact with each other and are immersed in a common electrolyte, or when the same metal is exposed to electrolyte with different concentrations.

  7. Intergranular corrosion - Wikipedia

    en.wikipedia.org/wiki/Intergranular_corrosion

    High strength aluminium alloys, especially when extruded or otherwise subjected to high degree of working, can undergo exfoliation corrosion (metallurgy), where the corrosion products build up between the flat, elongated grains and separate them, resulting in lifting or leafing effect and often propagating from edges of the material through its ...

  8. Galvanic series - Wikipedia

    en.wikipedia.org/wiki/Galvanic_series

    The galvanic series (or electropotential series) determines the nobility of metals and semi-metals.When two metals are submerged in an electrolyte, while also electrically connected by some external conductor, the less noble (base) will experience galvanic corrosion.

  9. Exfoliation corrosion (metallurgy) - Wikipedia

    en.wikipedia.org/wiki/Exfoliation_corrosion...

    In metallurgy, exfoliation corrosion (also called lamellar corrosion [1]) is a severe type [2] of intergranular corrosion that raises surface grains from metal by forming corrosion products at grain boundaries under the surface. It is frequently found on extruded sections where grain thickness is not as thick as the rolled grain.