Aluminum alloys are highly sensitive materials, and both 6000 series and 7000 series aluminum alloys are particularly prone to issues when using cutting fluids during machining. One of the most common problems is discoloration, often appearing as black spots or fading on the surface of the workpiece.
Yesterday, we discussed how to address blackening in magnesium alloy machining with cutting fluids. Today, let’s take a closer look at the more typical issues that occur when working with aluminum alloys. Specifically, the problem of black spots and fading caused by semi-synthetic cutting fluids needs to be properly addressed.
Aluminum alloys are inherently reactive, especially under certain machining conditions. The presence of cutting fluids can accelerate corrosion if not properly formulated. This is why it's essential to use specialized cutting fluids designed for aluminum. These fluids typically include anti-oxidation additives to prevent discoloration and maintain the integrity of the machined parts.
In the case of semi-synthetic cutting fluids, black spots and fading often result from inadequate corrosion protection. The fluid may contain components that react with the aluminum surface, leading to unwanted discoloration. To resolve this, manufacturers can adjust the formula by adding effective corrosion inhibitors. This is a common issue in many industrial settings where aluminum parts are processed.
Most instances of black spots on aluminum parts are indeed caused by corrosion from the cutting fluid. Therefore, selecting the right type of fluid is crucial. If you're facing challenges with aluminum machining or want to improve your current process, feel free to reach out to Dongguan Meike Cutting Fluids for expert advice and tailored solutions.
For more information, check out our related products: [grinding fluid] [cutting oil].
Note: This article was originally published on the Meike Cutting Fluid Network at http://news.chinawj.com.cn.
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