Nadcap-Accredited Coating Suppliers for Powder Finishes

ISO 9001 and AS9100 audit your management system; Nadcap audits the special process itself against a detailed technical checklist. For coatings the governing audit criteria fall under the Coatings (CT) commodity, with checklists in the AC7108 family covering the specific coating types a shop is accredited for. The auditor is not asking whether you have a procedure; the auditor is standing at the line confirming that the procedure matches what operators actually do, that the parameters recorded match the validated process, and that the equipment is qualified. The other defining feature is that Nadcap is a merit-based, customer-consensus program run by PRI under the SAE banner. Prime members (engine OEMs, airframers, and major Tier 1s) define the requirements and the Task Group dispositions the audit. A finding is not closed when the auditor leaves; the supplier must submit root cause and corrective action that the Task Group accepts before accreditation is granted or maintained. That consensus model is why a Nadcap accreditation carries weight a generic certificate does not. Pyrometry is frequently the make-or-break area for any thermally processed coating. Even though powder cure ovens are less extreme than heat-treat furnaces, Nadcap expects controlled and documented oven temperature uniformity surveys, calibrated thermocouples, and recorded cure profiles, because undercure is invisible until the finish fails. Expect the auditor to scrutinize temperature measurement and the cure record more than almost anything else.

PRI publishes accreditation status in eAuditNet, the authoritative registry, and a buyer should treat it the way an aerospace buyer treats OASIS for AS9100. Look the supplier up and confirm two things beyond active status: the commodity (Coatings) and the specific accreditation scope, because Nadcap accreditation is granted against named processes and customer specifications, not as a blanket 'coatings' stamp. A shop accredited for one coating type or for a specific prime's spec is not automatically accredited for your powder process unless the scope lists it. The most common and costly mistake is assuming a Nadcap-accredited finishing shop covers powder coating when their accreditation is actually for liquid paint, dry film lubricant, or another coating commodity entirely. Read the scope line by line and match it to the process specification your drawing invokes. Also confirm the accreditation interval and that the certificate is not in a lapsed or merit-reduced state; Nadcap intervals can extend with sustained good performance but contract back after findings, so the current status in eAuditNet is what counts, not a PDF the supplier emailed you.

This is an honestly uncommon combination, and a buyer should know that going in. Most Nadcap coating accreditations exist for liquid aerospace paint systems, dry film lubricants, and conversion-coat-plus-primer-plus-topcoat schemes that dominate flight hardware, because those are what prime coating specifications most often invoke. Powder coating appears on aerospace and defense hardware mainly on ground-support equipment, enclosures, racks, and non-critical structural and decorative parts, and only a subset of those carry a flowdown that demands Nadcap accreditation specifically for the powder process. So the practical guidance is: confirm the requirement before you go hunting for a Nadcap powder coater. If your prime's flowdown invokes a coating specification that calls for Nadcap accreditation and your finish is powder, you need a shop whose eAuditNet scope explicitly covers powder coating to that spec, and that supplier pool is small, which lengthens lead times and raises cost. If the powder finish is governed only by AS9100 special-process controls without a Nadcap flowdown, you do not need Nadcap and should not pay for a scope you cannot use. Reading the actual specification chain saves both money and weeks of sourcing.