: This standard deals with the phosphating of metals, a process that involves the formation of a phosphate-based coating on the metal surface. The coating is produced through a chemical reaction between the metal surface and a phosphating solution.

Unfortunately, I couldn't find a freely accessible PDF version of DIN 50965. As a copyrighted standard, it's typically only available through purchase or subscription from the German Institute for Standardization (DIN) or other authorized providers.

: Does not apply to semi-finished products or fasteners, which are typically covered by standards like DIN EN ISO 4042 Key Functions

: Guidelines for verifying the quality of the tinning through chemical or physical testing. Current Status