Answer Happy

Explain how hardness of water affects boilers and pipelines.
The diagram shows an iron shelf-bracket. Two stainless steel screws were used to fasten the bracket to a brick wall via the holes D and E. Copper screws were used to fix the wooden shelf in place using holes B and C. Comedo After 2 years there was extensive corrosion in some parts of the bracket as well as general overall corrosion. Explain each of the following observation: i. The extensive corrosion at the bend A. ii. The fairly extensive corrosion round the screw holes B and C. iii. The corrosion around the cut edge.