Quality Principle

After surface treatment of metal products, even if the appearance quality fully meets the design requirements, there may still be some minor manufacturing defects that are difficult to detect or not obvious under rough inspection conditions, and require experienced inspectors to screen and judge. The following is an introduction to the appearance defects collected by our professional inspection engineer team.

  • Material deformation pits, damage by external forces, visible depressions after powder coating

    Material deformation pits, damage by external forces, visible depressions after powder coating

  • Visible traces afterpowder coating

    Visible traces afterpowder coating

  • Defective notches generated by laser cutting

    Defective notches generated by laser cutting

  • Squeeze marks generated by bending mold

    Squeeze marks generated by bending mold

  • Visible traces of rivet nuts after finish

    Visible traces of rivet nuts after finish

  • Poor flatness of the board, poor straightness of the profile, and overall deformation caused by material defects or processing

    Poor flatness of the board, poor straightness of the profile, and overall deformation caused by material defects or processing

  • Local deformation caused by impact during transportation

    Local deformation caused by impact during transportation

  • The marks formed by uneven polishing of the weldseams

    The marks formed by uneven polishing of the weldseams

  • Not flat splicing seams with obvious gaps or cracks at the splicing welds

    Not flat splicing seams with obvious gaps or cracks at the splicing welds

  • Slot holes Increased according to actual needs when designing bending processes

    Slot holes Increased according to actual needs when designing bending processes

  • Plastic powder block or impurities that protrude from the surface or clump in the coating

    Plastic powder block or impurities that protrude from the surface or clump in the coating

  • Multiple shrinkage pores with visible depth are generated in the coating

    Multiple shrinkage pores with visible depth are generated in the coating

  • A big block wrinkled surface resembling orange peel on the coating

    A big block wrinkled surface resembling orange peel on the coating

  • Much bubble protrusions appear on the surface due to poor spraying operation

    Much bubble protrusions appear on the surface due to poor spraying operation

  • Coating peeling off due to poor spraying operation or collision

    Coating peeling off due to poor spraying operation or collision

  • The partly powder layer is too thin, resulting in a uneven color block after finish and the visible surface of the substrate, usually in the corner or back side

    The partly powder layer is too thin, resulting in a uneven color block after finish and the visible surface of the substrate, usually in the corner or back side

  • The marks left by the hook shielding during powdercoating

    The marks left by the hook shielding during powdercoating

  • Due to excessive and uneven local spraying, there is a concentrated accumulation block after finish

    Due to excessive and uneven local spraying, there is a concentrated accumulation block after finish

  • Due to excessive local spraying, thick and concentrated coating blocks are produced in the corners

    Due to excessive local spraying, thick and concentrated coating blocks are produced in the corners

  • Due to incomplete cleaning of the production line, there are color spot defects that do not match the color of the product

    Due to incomplete cleaning of the production line, there are color spot defects that do not match the color of the product

  • Traces left on the surface of the product due to incomplete cleaning of oil stains

    Traces left on the surface of the product due to incomplete cleaning of oil stains

  • The difference color than sample or the color card

    The difference color than sample or the color card

  • Not smooth surface between the junction of two different colors

    Not smooth surface between the junction of two different colors

  • Pattern blurring, ghosting, breakage, tilting, deviation, poor adhesion, after screen printing

    Pattern blurring, ghosting, breakage, tilting, deviation, poor adhesion, after screen printing

  • Welding slag splashed onto the surface of the plate but not removed

    Welding slag splashed onto the surface of the plate but not removed