F008--规范

ST.JOSEPH TECHNOLOGY CENTER - ST.JOSEPH, MICHIGAN 49085 USA 1 of 2 Prepared By: P. McCann Rev. Letter: EDate: 10-18-07 EN No.:526491 F-8 - Phosphate and Oxide TypeFinishes as Applied to Ferrous Parts1.0 Subject: Phosphate and oxide type finishes as applied to ferrous parts2.0 Object: This specification applies to phosphate or oxide coatings with or without additional protection suchas paint, oil, wax, etc. as applied to ferrous parts for corrosion protection.3.0 Grades and Applications:3.1 Grade 1: Phosphate plus protective paint. This is required where maximum resistance to humidity, laundrychemicals, etc. is required over a prolonged period and where corrosion of the part would adversely affectthe appearance or function of the product. This finish may require an additional coating of paint and/or waxto meet the corrosion requirement.3.2 Grade 2: Phosphate plus protective paint. This is used where good corrosion resistance to ambienthumidity conditions over a prolonged period is required.3.3 Grade 3: Phosphate plus protective oil compound. This is used for protection where ambient humidityconditions are not severe. It is not recommended where detergent resistance is required. This may findapplication on threaded parts where the lubricating property of the finish is desired. The oil finish shall beacceptable to the user.3.4 Grade 4: Phosphate coating. This coating is essentially an in soluble metal phosphate film produced byreaction of the part surface with bath chemicals. The type of phosphate used is optional. This finish is usedfor short term corrosion or for anti-friction properties.3.5 Grade 5: Black oxide finish. This finish is a black oxide of iron (magnitite, Fe3O4) produced by immersionin a hot alkaline aqueous salt solution. Its chief advantage is attractive appearance, economy, and ease ofapplication. It is used primarily for decoration and identification and is not recommended for severecorrosion exposure or abrasion resistance.3.6 Grade 6: Blue oxide finish. This is a thinner layer oxide (magnitite, Fe3O4) finish used on oil temperedsteel parts. It is not recommended for severe corrosion requirements.4.0 References:4.1 Humidity Test, T-224.2 Salt Spray Test, T-235.0 Instructions:5.1 Precedence: These specifications are intended as reference supplements to the engineering drawingspecifications. The engineering drawing is the final authority in all questions regarding specificationjurisdiction.5.2 Relief of Embrittlement: If the finishing process may produce hydrogen embrittlement detrimental to theperformance of the part, the parts should be baked or treated in a manner which will eliminate embrittlementand not degrade the finish.ST.JOSEPH TECHNOLOGY CENTER - ST.JOSEPH, MICHIGAN 49085 USA 2 of 2 5.3 Sampling: Parts selected for testing to this specification shall be sampled from production shipments. Aminimum of 3 samples should be run per test.6.0 Detail Requirement:1 2 3 4 5 6Grade:6.1 Finish Type:Phosphate Black Oxide Blue OxidePhosphate & Paint Phoshpate &Oil6.2 Humidity Resistance (per T-22): The applied finish must withstand the specified number of hours ofcontinuous exposure and must not show more than 6 corroded areas visible to the unaided eye per 900 cm2 (1ft2) of surface or any corroded area larger than 1.6mm (1/16 inch) in diameter. A corroded area is defined asexposure or corrosion of the substrate base metal.X600hoursX400hourshours X19272 hours X24 hours X8 hours X6.3 Salt Spray Resistance (per T-23): The applied finish must withstand the specified number of hours ofcontinuous exposure and must not show more than 6 corroded areas visible to the unaided eye per 900 cm2 (1ft2) of surface or any corroded area larger than 1.6mm (1/16 inch) in diameter. A corroded area is defined asexposure or corrosion of the substrate base metal.Xhours192Xhours12048 hours X7.0 Packaging & Delivery: Components are to be packaged in a manner suitable to the division(s) affected toinsure adequate protection during shipment and storage. Marking of shipment shall be in accord withagreement obtained with affected division(s).8.0 Acceptance Conditions: The various levels of acceptance are intended to apply to all production parts andrepresent adequate levels of quality for customers' use of the product. Assurance that these levels ofacceptance are met is the responsibility of the quality control department using whatever inspection methodsthey designate.Revised By: Date: Revision Letter: EN No.:D. Uland 02-23-82 AL. Erickson 12-03-85 BC. Cravens 10-23-89 CL. Erickson 01-29-92 DP. McCann 10-18-07 E 526491*** End of Specification ***。