Question

which type of soldering flux is used for soldering galvanised iron​

Answer 1

Answer:

Johnson J-33 Galvanized Steel Flux - Gallon ......

Johnson's "J-33 Galvanized Flux" is the superior choice for soldering sheet metal seams. This flux for soldering galvanized steel is an active chloride formulation with more strength than just plain muriatic acid.

Answer 2

Hydrochloric acid

• The chosen flux for soldering operations is often any metal. By using another liquid metal, metallic materials are linked together through the process of soldering (solder).
• Due to oxidation, all metal rusts to some extent when exposed to air.
• Before soldering, the layer of rust needs to be removed. For this, a chemical agent known as flux is applied to the joint.
• When concentrated hydrochloric acid comes into contact with air, it releases vapours. It serves as a flux for galvanised or zinc-iron sheets of metal. Muriatic acid is another name for this.
• Killed spirits are the name for zinc chlorides. It is mostly used to solder sheets of copper, brass, and tin.

Hence, hydrochloric acid is used for soldering galvanised iron.

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