1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Para. No. Revisions1978 07 18 Metricated and Retyped CE3H-RD782440-E1963 07 31 Released E7-2738Page 1 of 1OXIDE COATING ESE-M6P1-A1. SCOPEThe coating described under this specification is an oxide coatingapplied to cast iron p
2、iston ring segments for the purpose of improvingappearance and performance.2. APPLICATIONThis specification was released originally for a coating applicable tothe lower compression ring on automotive pistons.3. REQUIREMENTS3.1 APPEARANCEA uniform black appearing color.3.2 COATING THICKNESSThe coatin
3、g is a combination of etching and an oxide formation withessentially no build-up on the part.3.3 CORROSION PROTECTIONParts shall be dipped in a rust inhibitor after treatment.3.4 SUPPLIERS RESPONSIBILITYMaterial supplied to this specification must be equivalent to thatoriginally approved. Changes in
4、 formulation or processing shallnot be made without prior approval as described in SupplierProcedure I-A.4. APPROVAL OF SUPPLIERSSuppliers to this specification must be approved by the affected productengineering office. Procedure for gaining approval of a specificmaterial to a new/existing ES-M spe
5、cification is contained in SupplierProcedure I-A. Approved new suppliers will be added to the EngineeringMaterials Approved Source List.5. GENERAL INFORMATIONThe material data included herein is for information only and is not arequirement for the supplier.5.1 METHODThe following has been found satisfactory.Place parts in a steam atmosphere furnace at approximately 540 Cfor one half hour.
