Chrome Stripping: A Key Step in CNC Machining(injection moulding defects Alvis)

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When it comes to precision manufacturing, Computer Numerical Control (CNC) machining plays a vital role. By utilizing computerized controls, this advanced process enables the production of intricate and accurate parts for various industries. In the realm of CNC machining, chrome stripping serves as a fundamental step that ensures optimal surface preparation before coating or further processing.

What is CNC Machining?

CNC machining is a subtractive manufacturing method that utilizes pre-programmed computer software to control the movement of tools and machines. It involves the precise removal of material from a workpiece to produce complex shapes and designs. This automated process offers numerous advantages, such as consistent quality, high accuracy, increased production speed, and cost savings.

Importance of Surface Preparation in CNC Machining:

Achieving flawless results in CNC machining highly depends on proper surface preparation. The objective is to create an ideal foundation for subsequent processes, including plating, coating, or painting. Chrome stripping specifically addresses the removal of previously applied chrome layers, old coatings, rust, or imperfections, restoring the integrity of the base material for improved adhesion and durability.

Chrome Stripping Process in CNC Machining:

1. Evaluation and Assessment:
Before commencing with chrome stripping, thorough evaluation and assessment of the workpiece are essential. Determining factors like the type and condition of chrome layer or underlying material assists in selecting the most suitable stripping technique.

2. Stripping Techniques:
a) Mechanical Stripping:
This process involves using abrasive materials like sandpaper, wire brushes, or blasting media to physically remove the chrome layer. Mechanical stripping can be effective but may lead to surface damage if not executed skillfully.

b) Chemical Stripping:
Chemical stripping employs specific chemical solutions and/or acids to dissolve the chrome layer while preserving the substrate. This method requires expertise and adherence to safety precautions due to the corrosive nature of the chemicals used.

c) Electrolytic Stripping:
Electrolytic stripping is an electrochemical process that uses a specialized electrolyte solution and an electric current to remove the chrome layer selectively. This non-abrasive method provides precise control over the stripping process but demands careful handling of electrical components.

3. Surface Preparation:
Once the chrome layer has been successfully removed, thorough cleaning and preparation of the workpiece are crucial. It involves removing any remaining debris, traces of the stripping agent, or surface contaminants. Proper rinsing and drying ensure a pristine base before proceeding with subsequent processes.

4. Post-Stripping Considerations:
After chrome stripping, it is vital to inspect the workpiece for imperfections, damages, or residual coatings that may require further attention. Depending on the intended use, additional treatments like sandblasting, polishing, or heat treatment can be performed to optimize the part's surface condition as per specifications.

Benefits of Chrome Stripping in CNC Machining:

1. Enhanced Adhesion:
By removing existing chrome layers and other residues, the stripped surface facilitates superior adhesion of subsequent coatings or platings. Improved adhesion ensures longevity, resilience, and long-lasting performance of the finished component.

2. Precise Material Removal:
The selective nature of chrome stripping techniques allows for meticulous removal of specific areas while keeping the surrounding material intact. This level of precision minimizes unnecessary material loss, reducing costs and preserving structural integrity.

3. Customization and Modification:
Chrome stripping enables modifications to existing components by removing undesired chrome layers or coatings. With precise stripping techniques, intricate designs or patterns can be achieved, allowing for customized finishes or creative alterations to meet unique requirements.


In the world of CNC machining, chrome stripping serves as a critical step towards achieving flawless results. Through this essential process, professionals can prepare surfaces effectively, ensuring optimal adhesion and durability in subsequent coating or plating applications. Stripping techniques like mechanical, chemical, or electrolytic methods, when performed with expertise and caution, guarantee precise material removal. By incorporating chrome stripping into CNC machining workflows, manufacturers can uphold the highest standards of quality, accuracy, and customization for their products. CNC Milling CNC Machining