Mechanical Engineering - Workshop Technology - Discussion

Who this process of sheradizing take place?

What is sherardizing?

Sherardising or sherardizing is a method of galvanising also called vapour galvanising. It is named for its discoverer Sherard Cowper-Coles (1900). Zinc evaporates and diffuses into the metal target object forming Zn-Fe-phases by heating the object in an airtight container with zinc powder.

Sherardising or sherardizing is a method of galvanising also called vapour galvanising. It is named for its discoverer Sherard Cowper-Coles (1900). Zinc evaporates and diffuses into the metal target object forming Zn-Fe-phases by heating the object in an airtight container with zinc powder. The temperature that the container reaches normally does not exceed the melting point of zinc. Another method of sherardisation is to expose the intended objects to vapour from molten zinc using a reducing gas to prevent oxidation.

Sherardising is ideal for small parts and parts that require coating of inner surfaces, such as batches of small items.

I think answer is tie between Galvanizing and sherardizing because both are zinc coating process.

Erardizing is a thermal diffusion process and involves placing the pre-cleaned components to be coated into a container, along with a distribution media and a calculated mass of zinc powder.

The container is sealed and placed into a furnace which is raised to a temperature of between 330°C and 425°C in order to vaporise the zinc, allowing it to form an alloy with the substrate. At the same time, the container is rotated for a pre-determined length of time, usually between 2- 4 hours.

The resultant Sherardized coating is smooth, matt grey in appearance and uniform in thickness, the normal range being between 15 to 80 µm, although thicker coatings up to 100 µm are possible.

What is galvanizing?

Galvanising is the process of applying a coating of zinc to steel, in order to protect it against corrosion. The most common method used for the majority of sizes of steel members or fabrications is hot dip galvanising which involves the entire immersion of the steel product into a bath of molten zinc.

If it's sherardizing and galvanising then what should be the answer?

Why not Galvanizing?