What kinds of abrasives are used in manufacturing cookware?
What kinds of abrasives are used in manufacturing cookware depending primarily on the processing stage (such as coarse grinding, medium polishing and fine polishing) and the cookware material (such as stainless steel, cast iron, and titanium alloy).
Zhengzhou haixu abrasives co.,ltd,as manufacturer of abrasives from china for many years,from the dealing cases,we can make a conclusion as follows:
1.For the surface treatment of cookware,usually use white Corundum or Brown Corundum for blasting,mainly sizes is F40 F60 or F80.
The chemical compostion and physical properties of white corundum and brown corundum is as follows seperately:
| Item | White corundum | Brown corundum |
| Al2O3 | ≥99.5% | ≥95.0% |
| Fe2O3 | ≤0.04% | ≤0.30% |
| SiO2 | ≤0.10% | ≤1.0% |
| Na2O | ≤0.30% | / |
| Mohs Hardness | 9.0 | 9.0 |
| Specific Gravity | 3.90g/cm3 | 3.90g/cm3 |
| Bulk Density | 1.75-1.95g/cm3 | 1.53-1.99g/cm3 |
Particle range of F40 F60 &F80
| Size | Particle Range/um |
| F40 | 500-425 |
| F60 | 300-250 |
| F80 | 212-180 |
2.For non-stick coating ,usually use green carborundum #800mesh #1000mesh and #1200mesh.
The chemical compostion and physical properties of green carborundum is as follows:
| SiC | ≥98.5% |
| CF | ≤0.20% |
| Fe2O3 | ≤0.40% |
| SiO2 | ≤0.05% |
| Density | ≥3.18g/cm3 |
| Mohs Hardness | 9.4 |
| Melting Point | 2250℃ |
| Refractoriness | 1900℃ |
PSD(Particle Size Distribution) of green carborundum #800 #1000 Ұ
| Size | DO(um) | D3(um) | D50(um) | D94(um) |
| #800 | ≤38 | ≤31 | 14.0±1.0 | ≥9.0 |
| #1000 | ≤32 | ≤27 | 11.5±1.0 | ≥7.0 |
| #1200 | ≤27 | ≤23 | 9.5±0.8 | ≥5.5 |
