Aluminum 390 Alloy has a high content of Silicon (Si). Various covalent bonds of the Al, Fe, and Si are therefore formed when the barrier is lost. |
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Hot spots on the die's surface can eventually cause a loss of lubricant by burn off.
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Since aluminum (Al) and iron (Fe) have a natural affinity for each other, the loss of lubricant,
temperature of the metal and impingement of the aluminum weaken the surface
which leads to chemical changes to the die's surface.
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Over the time,
temperature, and velocity combinations, the aluminum impinges on the surface to
interact with the iron to form an intermetallic covalent bond. Chemical corrosion
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