Teflon Coating "Method of Pinhole Inspection"
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To use Teflon coating for a long time, not only selection and processing technology are important, but also quality inspection. Let me introduce Yoshida SKT's quality inspection.
Why is it a problem if there are pinholes in the Teflon coating film in the first place? In a typical fluororesin coating (thickness: 20-50 μm), there are countless holes (pinholes) that are invisible to the eye and reach the substrate. For applications that require non-stick or slippery properties, these pinholes rarely have a negative impact on performance. However, in applications where corrosion resistance is required, chemicals can reach the substrate (metal) through the pinholes, causing corrosion and leading to holes or causing the coating to peel off. To eliminate pinholes, the coating can be thickened by applying multiple layers, ensuring that there are no pinholes that connect the coating surface to the substrate. At Yoshida SKT, we conduct inspections using insulation resistance meters, pinhole testers, and chemical detection methods according to the coating specifications and substrates. These methods are non-destructive tests that do not damage the coating film. *For more details on pinhole inspection, please visit our website via the link or contact us.*
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