| 摘要 |
Provided is an electrically conductive coating which aids in resistance spot welding of aluminum sheets and galvanized steel sheets. The electrically conductive coating comprises a non-metallic component selected from carbon black, carbon black feedstock, graphite, an ionic substance, or a mixture of ionic substances, in a proportion greater than 95%, in a form selected from a colloidal, power, film, slurry, suspension or liquid. The electrically conductive coating has a thickness between 10-1000 microns and an electrical resistivity between 10-50 micro-ohms-meter which provides a decreased contact resistance between the work-piece and the electrode, thereby, preventing the electrode tip from fouling and increasing the electrode service life. |
