What type of flux is silver brazing flux classified as?

Silver brazing flux is classified as paste borne. This type of flux typically comes in a paste form, which is advantageous in the brazing process as it can be easily applied to the joint areas that need to be brazed. The paste consistency allows for the flux to adhere well to surfaces, ensuring that it remains in place during heating.

In addition, paste fluxes generally contain a mixture of various inorganic compounds that help with the removal of oxides from the metal surfaces, promoting better bonding when the silver filler metal is applied. This is crucial because contaminants or oxidation on the metal surfaces can lead to weak joints.

Other forms of flux, such as solids or liquids, do exist, but they do not provide the same ease of application or effectiveness in the silver brazing process as paste-form flux. Gas fluxes are generally not used in silver brazing, as the flux must be present in a physical form that can adequately protect the joint during the temperature increases needed for brazing. Hence, the classification of silver brazing flux as paste borne is accurate, as it aligns with the properties and usage in the context of brazing operations.