Sherardizing is the formation of a corrosion-resistant, zinc-iron alloy coating, on the surface of steel or iron.
The method involves the heating of the object in an airtight container that has zinc powder.
A thermal diffusion process occurs and the zinc diffuses into the object’s metal surface, forming the zinc-iron alloy.
145) A zinc diffusion process is called
Answer is:
sheradising
Explanation:
Related Workshop Technology MCQ with Answers
Answer is:
process of coating zinc by hot dipping
Explanation:
Galvanizing is a process of coating zinc by hot dipping.
Answer is:
anodizing
Explanation:
Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish.
Aluminum is ideally suited to anodizing, although other nonferrous metals, such as magnesium and titanium, also can be anodized.
Answer is:
forging
Explanation:
old chisels are forged to shape and hardened and tempered at the cutting edge. Although the vast majority of cold chisels are made of steel, a few are manufactured from beryllium copper, for use in special situations where non-sparking tools are required.
Answer is:
cast tool steel
Explanation:
Cold chisels are made from carbon tool-steel, which is usually octagonal in cross-section.
Tool-steel is used as it can be hardened to form a hard and tough cutting edge.
To make a cold chisel heat the end of the bar of tool steel until it is bright red and hammer to the desired shape.