What is Gas Flux and Why is It Used?

The use of gas flux is very important when brazing metal parts such as copper and brass. Gas flux is an auxiliary substance that improves the efficiency and quality of the brazing process. In this article, we will consider the causes and consequences of using gas flux.

Gas flux is a type of cleaner and activator that helps prevent oxidation on metal surfaces during brazing. The surfaces of metals such as copper and brass oxidize over time by contact with air. This oxide layer prevents the braze from spreading smoothly over the surfaces and forming a quality bond. When gas flux is applied before brazing, it cleans the oxide layer on the surfaces and ensures better adhesion of the braze.

Benefits of Using Gas Flux

1. Surface Cleaning and Adhesion: Gas flux cleans the surfaces and removes the oxide layer before brazing. In this way, the braze material adheres better to metal surfaces and creates a quality bond.

2. Sealing and Durability: The use of gas flux ensures a leak-proof bond between the brazed parts. Sealing is important for liquid and gas tightness. At the same time, parts brazed with gas flux are more durable and long-lasting.

3. Even Thermal Distribution: Gas flux allows heat to spread more evenly during brazing. This helps to obtain homogeneous and properly brazed parts.

Negative Effects of Not Using Gas Flux

1. Poor Quality Connection: Brazing processes performed without the use of gas flux may create poor quality connections due to the presence of the oxide layer on the surfaces. These connections may become loose over time or cause sealing problems.

2. Poor Sealing: Sealing problems may occur in brazing without using gas flux. This can lead to liquids and gases escaping and reducing system efficiency.

3. Risk of Corrosion: Brazing oxidized surfaces can create connections that are prone to corrosion. This can shorten the life of parts and reduce the reliability of systems.

In conclusion:

The use of gas flux when brazing metal parts such as copper and brass is important to create quality and reliable connections. Gas flux increases brazeadhesion and sealing by cleaning the surfaces. Brazing processes performed without using gas flux may lead to poor quality connections, sealing problems and risk of corrosion. Therefore, the use of gas flux is recommended for effective and safe brazing.