DCI OFFERS THE FOLLOWING SPECIALIZED CLEANING PROCESSES ON STAINLESS STEEL AND EXOTIC ALLOYS:
|Alpha Case Removal||Chemical Descaling|
|Pre-Penetrant Etch||Etch Inspection|
|Citric Acid Passivation||Titanium Cleaning|
|EDM Recast Removal||Alkaline Cleaning|
Alpha Case is an oxygen enriched, alpha stabilized surface that can be either casting or thermally generated. The alpha case is problematic to the subsequent use of the article in some applications because it has reduced fatigue resistance and increased susceptibility to impact damage, as compared with the underlying alpha-beta or other microstructure. In conjunction with our state-of-the-art lab, DCI will cut mount and polish your specimen to determine the alpha case layer thickness. After the layer thickness is established, DCI can use mechanical and chemical means to remove the desired dimension.
Passivation is the chemical treatment of a stainless steel with a mild oxidant, such as a nitric or citric acid solution, for the purpose of the removal of free iron or other foreign matter. The formation of the protective passive film on a stainless steel will occur spontaneously in air or other oxygen-containing environment when the stainless steel surface is free of oxide scale and exogenous matter.
DCI OFFERS THE FOLLOWING POST-TEST VERIFICATION SERVICES:
- Practice A – Water Immersion Test
- Practice B – High Humidity Test
- Practice C – Salt Spray Test
- Practice D – Copper Sulfate Test
- Practice E – Potassium Ferricyanide-Nitric Acid Test
- Practice F – Free Iron Test
- Clean and Passivate
Descaling (Pickling) is the removal of heavy, tightly adherent oxide films resulting from hot-forming, heat treatment, welding, and other high-temperature operations. When necessary, scale may be removed by chemical methods, mechanical methods (for example, abrasive blasting, sanding, grinding, power brushing), or by a combination of these.
Pre-Penetrant Etch uses either acid or caustic solutions to remove 0.0001″ to 0.0004″ of material from the parts’ surface. DCI offers immersion or swab etching. Material smearing can have a detrimental effect on Liquid Penetrant Inspection as defects that are normally open to the surface can be partially or completely covered over. DCI’s etch line includes tanks for etching of titanium, aluminum, stainless steel, Inconell and other nickel-based alloys.
Cleaning Services: DCI can safely chemically or mechanically clean surfaces ranging from magnesium to titanium to our Pratt & Whitney (SPOP 211) approved Inconell cleaning line. DCI offers pre-weld cleaning of components to ACES 1178, as well as mechanical cleaning of welds with designated stainless steel and aluminum blasting cabinets. DCI is approved by Pratt & Whitney (PWA 83-A3), as well as Rolls-Royce, for solvent vapor cleaning. White layer removal, in accordance with PN 14.50-03, can also be performed for Hamilton Sundstrand products.
DCI AEROTECH OFFERS CLEANING TO THE FOLLOWING SPECIFICATIONS:
|ASTM B600||ACES 2486||ASTM A967|
|AMS 2463||GE P4TF2||HS 7725|
|AMS QQ-P-35||AMS 2700||PWA 83-A3|
|SPOP 211||ASTM A380||HS 760|
|PN 14.50-03||PN 14.10||HS 178|
|SPS- 209||ACES 16P50||ACES 16P51|
|VS 1-3-1-93||ACES 16P14||ACES 1178|
|EMS85040||EPS 11250||AS 7474|
|BAC 5625||DPS 9.07||MIL-STD-1504|
|PS 2026||SPG-MPS-026||ACES 7128|