What surface preparation is recommended before electrospark deposition coating?

In general, remove oils, oxides and debris, restore damaged geometry in the coating zone and ensure the electrode can access the wear area safely. The goal is a stable, consistent surface condition for repeatable results.

What are simple QA checks after carbide coating?

Useful QA checks include visual inspection for uniform coverage, verifying functional fit where tolerances matter, confirming texture in grip zones and ensuring the process is repeatable on subsequent parts.

Surface Preparation and Quality Assurance

Consistent carbide coating results depend on two things: a stable surface condition before deposition and a simple quality process after deposition. This guide outlines practical steps to improve repeatability, reduce rework and ensure the coating performs as intended in high-wear environments.

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Surface Prep Goals

Remove contaminants that can interfere with deposition (oil, grease, oxides, debris)
Create a stable surface condition in the coating zone for consistent results
Plan access and ergonomics so the electrode can reach the wear zone safely
Protect geometry on edges, corners and critical fits

If you’re stripping paint, rust or oxides prior to coating, portable laser cleaning can be a strong pre-step in the process flow. See the Laser Cleaning Guide.

Common Prep Steps Before Coating

1. Clean

Degrease and remove residue so the coating zone is clean and consistent. The goal is to avoid “fighting” oils or oxidation during deposition.

2. Address Damage

If a surface is nicked, chipped or distorted, restore the geometry first so the coating is applied to the shape you actually want to run in production.

3. Control the Coating Zone

Define where the coating starts and stops. Controlled coverage reduces unnecessary buildup and helps keep critical fits predictable.

Simple QA Checks After Coating

QA doesn’t need to be complicated. The most useful checks are the ones that catch issues fast and keep production moving.

Visual inspection: uniform coverage, clean edges, no missed wear zones
Functional fit: verify clearances and mating surfaces where needed
Texture check: confirm grip pattern in contact zones (when grip is the goal)
Repeatability: confirm the process can be repeated on the next part with the same settings

Want a More Repeatable Coating Outcome?

If you share your part material, wear mode and target zones, we can recommend a prep and QA approach that improves consistency and extends tool life.

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Surface Preparation and Quality Assurance

Surface Prep Goals