Electrolytic Medium Composition for Pitting-Free Electropolishing

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Solution Overview

Problem

Existing electropolishing processes using solid electrolytes suffer from limitations such as the generation of 'orange peel' roughness, acid exudates causing pitting, uncontrolled oxidation, and inability to reduce roughness beyond a certain limit, along with mechanical resistance issues preventing delicate piece polishing.

Innovation Solution

Incorporating a non-conductive fluid immiscible with the conductive solution in solid electrolyte particles, enhancing particle connectivity and focusing electrochemical action on roughness peaks, while protecting the metal surface from acid and oxidation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If solid electrolyte particles are used for electropolishing, then the electrochemical effect is concentrated on roughness peaks, but orange peel roughness is generated and pitting occurs due to acid exudates

Engineering Contradiction:

Improvesurface roughnessVSAvoidorange peel roughness and pitting

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

A non-conductive fluid is introduced as an intermediary substance between the solid electrolyte particles and the metal surface. This fluid mediates the interaction by preventing direct contact between acid exudates and the metal surface, thereby eliminating pitting and orange peel roughness while preserving the concentrating effect on roughness peaks

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The non-conductive fluid creates an inert environment around the metal surface, isolating it from harmful acid exudates and atmospheric oxygen. This protective environment prevents uncontrolled oxidation and pitting, allowing the electropolishing process to proceed without these harmful side effects

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

2Object-affected harmful factors

If the concentration of acidic solution in solid electrolyte is reduced, then acid exudate problems are improved, but the electrochemical effect is weakened

Engineering Contradiction:

Improveacid exudatesVSAvoidelectrochemical effect

Core Design Contradiction:

Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

The electrolyte system is segmented into discrete solid particles rather than a continuous liquid solution. This segmentation allows the electrolyte to be distributed as individual particles that can be precisely controlled, enabling the use of higher acid concentrations within particles without the harmful effects of liquid acid pools

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The non-conductive fluid acts as a mediator that allows high-concentration acidic solutions to be contained within solid particles without causing harmful acid exudates. The fluid barrier prevents the acid from contacting the metal surface directly, decoupling the concentration of the electrolyte from its harmful effects

Inventive Principle:

Principle #24Intermediary (Mediator)

3Loss of substance

If solid electrolyte particles are used, then liquid waste is eliminated, but mechanical resistance prevents polishing of delicate pieces

Engineering Contradiction:

Improveliquid wasteVSAvoidpolishing of delicate pieces

Core Design Contradiction:

Loss of substanceVSEase of operation

Solution Approach 1:

A fluid system is introduced to transport and distribute the solid electrolyte particles. The non-conductive fluid creates a hydrodynamic environment that allows delicate pieces to be polished without direct mechanical impact from the particles, as the fluid cushions and distributes the polishing action

Inventive Principle:

Principle #29Pneumatics and hydraulics

Solution Approach 2:

The electrolytic medium is formulated as a composite system combining solid electrolyte particles with a non-conductive fluid. This composite material integrates the waste-reduction benefits of solid electrolytes with the gentle handling capabilities of liquid media, enabling both environmental and operational advantages

Inventive Principle:

Principle #40Composite materials

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

Achieves smoother finishes with reduced roughness, prevents pitting and oxidation, and allows for more selective and controlled polishing of metal surfaces.

Implementation Method 1

the non-conductive fluid included in the solid electrolyte enhances the connectivity between the particles

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 2

a new technology for polishing metal surfaces based on an electrochemical process using a solid electrolyte

Methodology Applied

Scientific EffectElectrochemical oxidation: Oxidation

Implementation Method 3

Document ES2604830 describes an electropolishing process with solid electrolyte by ion transport

Methodology Applied

Scientific EffectIon transport: Ion Repulsion/Attraction

Implementation Method 4

solid particles that retain a conductive solution

Methodology Applied

Scientific EffectIonic conduction: Conduction (electrical)

Data Source

PatentUS12590382B2Electrolytic medium, electropolishing process using such electrolytic medium and device to carry it out

Publication Date: 2026.03.31 DRYLYTE SL

AI summary

An electrolytic medium is provided to the treatment of metallic surfaces and includes solid particles and a non-conductive fluid, the process that uses said medium and the device to carry out the process.