The Percarbonate Stripping System for Thermal Spray (TS) Coatings-A Success Story at Tinker Air Force Base (TAFB)

Tuesday, May 12, 2015: 5:20 PM

Room 101B (Long Beach Convention and Entertainment Center)

Mr. John P. Sauer , Sauer Engineering, Cincinnati, OH

Mr. Justin Sneed , Tinker Air Force Base, Oklahoma City, OK

Mr. Dave Fairbourn , Aeromet Technologies, Sandy, UT

John P. Sauer Sauer Engineering

Justin Sneed Tinker Air Force Base (TAFB)

Dave Fairbourn Aeromet Technologies

Stripping systems for thermal spray coatings tend to use many hazardous acids which

require critical safety procedures and produce heavy volumes of environmentally

unfriendly waste streams. A very safe and environmentally friendly percarbonate based

chemical system has been created with minimal DC rectified voltage. It was successfully

qualified at Tinker Air Force Base (TAFB) and is currently in production use throughout the

facility. It has safely stripped WCCo and CrC-NiCr coatings from Ti 6-4 and IN718 substrates

showing minimal stock loss in 48 hr exposure testing. Many lessons were learned during this

qualification process which will be shared and documented.

The system can also be combined with a refining system that purifies the waste water and

condenses the coating sludge into a condensed volume, eliminating the tremendous

volume of waste chemicals.