mill scale meaning in Hindi

Examples

1. Mill scale is a nuisance when the steel is to be processed.
2. Mill scale is composed of iron oxides mostly ferric and is bluish black in color.
3. The original mixture, as invented, used iron oxide in the form of mill scale.
4. Thus mill scale can be removed from steel surfaces by flame cleaning, primers over which welding can be done safely.
5. Therefore, chemical or mechanical cleaning after initial hydrotesting, might be the best option for removing mill scale and any corrosion products.
6. Inside the slurry blasting cell, jets of water cleanse the steel strip of both the abrasive particles and the dislodged mill scale.
7. While the finished product is of good quality, the surface is covered in mill scale, which is an oxide that forms at high temperatures.
8. Because it is electro-chemically cathodic to steel, any break in the mill scale coating will cause accelerated corrosion of steel exposed at the break.
9. Mill scale is thus a boon for a while until its coating breaks due to handling of the steel product or due to any other mechanical cause.
10. This part of ISO 8501 is applicable also to steel substrates that show residues of firmly adhering paint and other foreign matter in addition to mill scale.