Environment protection method of handling industrial abandoned phosphorized liquid

Abstract

The invention discloses a environment protection handling method of industrial dumping phosphating liquid, which comprises the following steps: comprising regenerating utilization or inverting utilization; testing the known dispense waste phosphating liquid; checking the free acidity, total acidity and content of each effective composition; comparing the checking result with original phosphating liquid; adjusting the changeable component to the original phosphating liquid; mixing the known or unknown dispense dumping phosphating liquid and basic material proportionally; getting microcosmic salt as rust-preventive pigment of rust-inhibiting primer. This invention possesses flexible method and simple component, which can keep predominance product performance.

Description

technical field

[0001] The invention relates to a waste treatment method, in particular to a treatment method for waste phosphating solution. Background technique

[0002] Phosphating is a commonly used metal surface treatment technology, which in principle belongs to chemical conversion coating treatment. The early application of phosphating process is rust prevention. After phosphating treatment, a layer of phosphating film is formed on the surface of steel, which plays the role of rust prevention and lubrication. It is widely used for rust prevention in process, transportation, packaging storage and use. Phosphating mainly includes iron-based phosphating, zinc-based phosphating, and manganese-based phosphating. Phosphating treatment before metal coating can improve the adhesion between the paint film and the base metal, and improve the corrosion resistance of the entire coating system. Therefore, phosphating is widely used in the surface pretreatment of metal coating; ma...

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