Single-Stage Metal Pickling and Phosphating Device
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Solution Overview
Problem
Existing metal treatment facilities for phosphating require multiple baths and toxic chemicals, leading to high costs, environmental hazards, and facility downtime due to frequent chemical replacement and hydrogen embrittlement risks.
Innovation Solution
A single-stage treatment device using a phosphorus- or phosphate-containing solution in a continuous system with a turbulence device to prevent impurity deposition and reduce chemical usage, combined with a filter and pump system for efficient substance recirculation and purification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple baths with different chemicals are used for phosphating, then the treatment effect is achieved, but the facility requires large space and frequent chemical replacement
Solution Approach 1:
The patent combines multiple treatment functions (degreasing, pickling, phosphating) into a single bath containing a formulated aqueous composition with multiple active ingredients working synergistically. This eliminates the need for separate baths for each treatment step, reducing facility space while maintaining comprehensive treatment effectiveness.
Solution Approach 2:
The single bath composition is designed to perform multiple functions simultaneously: it acts as a degreaser, pickling agent, and phosphating solution. The formulated mixture of surfactants, acids, and phosphating compounds creates a universal treatment medium that replaces multiple specialized chemicals.
2Reliability
If multiple baths with different chemicals are used for phosphating, then the treatment effect is achieved, but chemical replacement and disposal costs are high
Solution Approach 1:
By combining multiple treatment functions into one bath, the patent reduces the total quantity of chemicals required and eliminates the need to replace multiple separate chemical solutions. The single formulated composition is more economical and reduces disposal costs.
3Reliability
If objects are conveyed from one bath to the next, then treatment is performed, but treatment time and operational complexity increase
Solution Approach 1:
The patent merges sequential treatment steps into a single simultaneous process. Objects remain stationary in one bath where all treatment actions occur concurrently, eliminating conveyance time and operational complexity while ensuring complete treatment through the multi-functional composition.
4Productivity
If sulfuric acid and hydrochloric acid are used in treatment baths, then pickling is effective, but toxicity and environmental harm increase
Solution Approach 1:
The patent changes the chemical parameters by replacing toxic strong acids (sulfuric and hydrochloric acid) with a safer acid mixture (nitric acid and phosphoric acid) that maintains pickling effectiveness through different chemical mechanisms while significantly reducing toxicity and environmental harm.
Solution Approach 2:
The patent converts potentially harmful substances into beneficial ones by substituting toxic acids with safer alternatives that still achieve effective pickling. The harmful factor (toxicity) is eliminated while the beneficial function (pickling efficiency) is preserved through alternative chemical pathways.
5Productivity
If hydrogen is involved in metal processing, then pickling occurs, but hydrogen embrittlement risk increases
Solution Approach 1:
The patent changes the chemical composition parameters by using nitric acid and phosphoric acid instead of traditional acids that generate hydrogen. This chemical substitution eliminates hydrogen generation during pickling, preventing hydrogen embrittlement while maintaining effective oxide removal and surface preparation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces chemical replacement frequency, minimizes environmental hazards, prevents hydrogen embrittlement, and enhances surface quality by creating a protective layer on treated objects, thereby improving manufacturing efficiency and safety.
Implementation Method 1
a pump device for replacing at least a portion of the treatment substance, wherein the treatment substance flows around at least a portion of the treatment object
Implementation Method 2
the treatment substance is a phosphorus- or phosphate-containing solution... wherein the reaction substance consists of phosphorus or a phosphate
Implementation Method 3
A turbulence device for turbulizing impurities, in particular solid particles, that deposit in the treatment substance
Data Source
AI summary
A treatment device is provided for single-stage treatment of a metal object, wherein the treatment comprises at least pickling and phosphating of the object. The treatment device comprises a treatment container for holding the object to be treated and for holding a flowable treatment substance, and a pumping apparatus for circulating at least a portion of the treatment substance. The treatment substance is flowable around at least part of the object to be treated, and the treatment substance is a phosphorus- or phosphate-containing solution. The phosphorus- or phosphate-containing solution consists of water and a reaction substance, and the reaction substance consists of phosphorus or of a phosphate and at least one additional substance that improves the treatment effect. The fraction of the phosphorous or the phosphate in the reaction substance is between 75 vol % to 94 vol %, and the reaction substance has no fractions of hydrochloric acid and sulfuric acid.