Metal Panel

Stainless steel splash guards installed in cleanrooms or food-grade processing lines serve the primary function of protecting surrounding equipment and the environment from liquid exposure while maintaining the integrity of their own surfaces. However, in practical applications, these components often exhibit premature surface rust and pitting within weeks or months of being put into service. Typically, three interrelated factors lead to premature corrosion of splash guards: the use of 304 stainless steel instead of molybdenum-containing 316L in environments containing chlorides or corrosive chemicals; manufacturing splash guards in areas where carbon steel is processed, where embedded iron particles cause cross-contamination and act as cathodes for electrochemical corrosion; and the absence or inadequacy of chemical passivation treatment after splash guard fabrication—a critical step that removes free iron from the surface and promotes the formation of a more uniform, corrosion-resistant oxide film. This article analyzes each of the aforementioned failure mechanisms from an engineering perspective and proposes practical corrective measures—ranging from steel grade […]

Splash guards installed in industrial equipment operate under constant mechanical vibration and fluid impact—an environment that subjects the protective coating to cyclic stresses far exceeding what decorative coatings can withstand. When the powder coating on custom splash guards peels off, the consequences go beyond mere cosmetic issues; the exposed substrate can lead to localized corrosion, which may shorten the component’s service life and increase subsequent maintenance costs. From a manufacturing engineering perspective, adhesion failure of the powder coating on splash guards is almost never a problem with the coating material itself. The root cause can be traced back to the production floor: residual drawing lubricants or cutting fluids form a low-surface-energy barrier between the substrate and the coating; meanwhile, scale on laser-cut edges cannot be fully penetrated by conventional phosphating pretreatment. These defects manifest as “false adhesion”: the coating adheres to a layer of oxide or contaminants rather than to the base metal itself; once subjected to vibration or fluid