Fig. 8: Corrosion morphologies of the bluish-white glaze surface and cross-section.

a Transition zone at the interlayer boundary on the glaze surface; b Dense dark spots, scratches, and pits distributed on the glaze surface; c Transparent glaze layer, with interconnected bubbles of various sizes; d Residual porous structure in a pit and large bubbles located at the glaze/porcelain body interlayer.