Abrasive Blasting, Shot Peening & Surface Prep calculator
Surface Contamination Risk Score Calculator
Oil, soluble salts, dust, spent media, and mixed abrasives can ruin surface prep even when the blast looks clean. This calculator gives inspectors and supervisors a quick risk score to decide whether more cleaning, testing, or segregation is needed before release.
What this calculator does
- Score the risk of coating or peening contamination using severity, likelihood, and detection difficulty.
- a quality inspector needs a practical contamination risk screen before coating, bonding, or peening acceptance
- Returns a weighted risk score for contamination that could affect adhesion, profile verification, or peening quality.
Formula used
- Contamination risk score = severity × 0.40 + likelihood × 0.35 + detection difficulty × 0.25
Inputs explained
- Contamination severity: undefined
- Contamination likelihood: undefined
- Detection difficulty: undefined
How to use the result
- Use it after dirty incoming parts, media changes, chloride concerns, oil leaks, or dust collector problems.
- It is not a lab result; verify with the required dust, chloride, oil, or cleanliness tests before acceptance.
Common questions
- What counts as contamination? Common examples are oil, grease, soluble salts, dust, embedded media, mill scale residue, and cross-contaminated abrasive.
- How should a high score be handled? Increase cleaning, inspection frequency, segregation, or hold points before coating or peening continues.
- Does this replace chloride testing? No. It helps decide when testing is needed; acceptance still depends on the project specification.
- Why include detection difficulty? Hidden contamination under dust, in pits, or on complex geometry is riskier because it can escape normal visual checks.
Last reviewed 2026-05-12.