Abrasives used in producing 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 aluminum oxide or Brown aluminum oxide for blasting,mainly sizes is F40 F60 or F80.
The chemical compostion and physical properties of white aluminum oxide and brown aluminum oxide is as follows seperately:
| Item | White aluminum oxide | Brown aluminum oxide |
| 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 sic #800mesh #1000mesh and #1200mesh.
The chemical compostion and physical properties of green sic 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 sic #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 |
