The phrase "a thick scale" is correct and usable in written English.
It can be used to describe something that has a considerable thickness, often in reference to physical objects like fish, reptiles, or even metaphorical scales in various contexts.
Example: "The fish was covered in a thick scale that shimmered in the sunlight."
Alternatives: "a heavy layer" or "a dense coating".
The SR-GIXRD data demonstrated that normal corrosion – in a carbon dioxide saturated brine – induced the formation of a thick corrosion scale of Fe2(OH)2CO3 and Fe2O2CO3, and this totally obscured the α-Fe diffraction peaks of the underlying steel substrate after 24 h.
The investigation has indicated that the failure attributed to the formation of thick scale of magnetite at the inner surface of the tube wall.
F. coccinea has a bulb of few thick scales.
Water vapor accelerated the growth rate of the oxides of NiO, Cr2O3 and spinel of NiCr2O4 due to the incursion of H, resulting in a higher mass gain and a thicker oxide scale with larger oxide grains of (Ni,Co O.
After oxidation at 1000 °C with a duration of 10 h, the Cr0.38Al0.57Nb0.05N and Cr0.35Al0.55Nb0.10N coatings exhibit a thicker oxide scale of ~0.7 and ~0.8 μm with Cr-rich/(Al, Nb -rich bilayered structure, while the Cr0.48Al0.52Nb -richhave a dense oxide layer with a thickness of ~0.2 μm.
Researchers have always assumed that the deep lines traversing the face and jaws of a crocodile marked the boundaries between thick scales that covered the animal's head.
Its legs have thick scales to protect the bird from snakebite.
Primitive bony fishes had thick scales of either the ganoid or the cosmoid type.
These rather thick scales, present in some primitive bony fishes, are well developed in the gars.
Primitive fishes usually had thick bony plates or thick scales in several layers of bone, enamel, and related substances.
Again, the trees are not defenseless: crossbills have more difficulty getting seeds from cones with large, thick scales.
