Flux for Soldering Galvanized Steel and Zinc Metal
Steel is often galvanized to create an effective barrier against corrosion and rusting. This process, while beneficial to the steel, can make it difficult to solder to, unless you have the right flux. Choose our No. 71 soldering flux, which is in liquid form, or the No. 71-Paste. These fluxes can be used with Lead-bearing and most Lead-free solders to get the soldering job done. Similarly, these fluxes work well when you need to solder to Zinc metal..
No. 71
| Superior Flux Number | No. 71 |
| Description | High-Activity Soldering Flux – Liquid Form |
| Rec. Base Metals | Galvanized Steel, Zinc, Stainless Steel, Carbon Steel, Copper, Brass and most alloys except Aluminum and Magnesium |
| Rec. Filler Metals | Tin-Based Solder Alloys |
| Rec. Temp Ranges | 95-425°C / 200-800°F |
| Specs. | O-F-506C, Type 1, Form B |
| SDS | Link |
| Spec. Sheet | Link |
No. 71-Paste
| Superior Flux Number | No. 71 Paste |
| Description | High Activity Soldering Flux – Paste Form |
| Rec. Base Metals | Galvanized Steel, Zinc, Stainless Steel, Carbon Steel, Copper, Brass and most alloys except Aluminum and Magnesium |
| Rec. Filler Metals | Tin-Based Solder Alloys |
| Rec. Temp Ranges | 95-425°C / 200-800°F |
| Specs. | O-F-506C, Type 1, Form B |
| SDS | Link |
| Spec. Sheet | Link |
No. 71 and No. 71-Paste are RoHS compliant.
When soldering galvanized steel or Zinc metal, you need an active flux like our No. 71 or No. 71-Paste. These fluxes contain the activator system needed for removing the difficult oxides that form on the surface of galvanized steel or Zinc. As is the case with all fluxes, particularly aggressive ones, it is important to use prescribed personal protective equipment (PPE) when handling and working with these fluxes, as indicated on the SDS. Be sure to work in a well ventilated area and to wear proper respiratory protection.
The residues from No. 71 and No. 74-Paste are corrosive and should be washed off after soldering with warm water. Use the paste flux when soldering on a part when adherence of the flux is important, such as a vertical or upside-down location. These fluxes come in pints, quarts, gallons, as well as jars and pails of various sizes. Contact us for more information about packaging and lead-time.