Preferred Dongguan Shengjie SJ-203 black agents zinc / zinc alloy hair Blackwater

Description SJ-203 zinc black agents: First, the zinc surface blackening agent for zinc, zinc alloys, die-cast zinc, galvanized and other black. With a color fast, strong adhesion, processing time, high production efficiency. No hanging gray surface. Low cost operation, two parameters: concentration: 1: 2-3; temperature: room temperature; Time: 30-60 seconds; Third, the process: the workpiece → degreasing → washing → activation → washing → zinc blackening agent → washing → good → closed. Fourth, maintenance: 1, the agent is a weak acid solution, and thus a greater effect on acid PH value, the amount of washing will clean to avoid contamination of activated acid solution. 2, the agent to open the cylinder potion faster response, after a period of time, the reaction rate will slow down, to be appropriate to extend the reaction time. 3, with the active ingredient reducing medicine, to extend the time blackness still can not reach, can clarify additional liquid filters, each additional 10% can be open cylinder black. V. Packing: 25KG / barrel