125760-01 B 571 Test Methods for Adhesion of Metallic Coatings3 B 578 Test Method for Microhardness of Electroplated Coatings3 B 602 Test Method for Attribute Sampling of Metallic and Inorganic Coating3 B 656 Guide for Autocatalytic Nickel-Phosphorus Deposition on Metals for Engineering Use3 B 667 Practice for Construction and Use of a Probe for Measuring Electrical Contact Resistance4 B 678 Test Method for Solderability of Metallic-Coated Products3 B 697 Guide for Selection of Sampling Plans for Inspection of Electrodeposited Metallic and Inorganic Coatings3 B 762 Method for Variable Sampling of Metallic and Inorganic Coatings3 B 849 Specification for Pre-Treatment of Iron or Steel for Reducing the Risk of Hydrogen Embrittlement3 B 850 Specification for Post-Coating Treatments of Iron or Steel for Reducing the Risk of Hydrogen Embrittlement3 B 851 Specification for Automated Controlled Shot Peening of Metallic Articles Prior to Nickel, Autocatalytic Nickel, Chromium, or As A Final Finish3 D 1193 Specification for Reagent Water5 D 2670 Method for Measuring Wear Properties of Fluid Lubricants (Falex Method)6 D 2714 Method for Calibration and Operation of an Alpha LFW-1 Friction and Wear Testing Machine6 D 3951 Practice for Commercial Packaging7 D 4060 Test Method for Abrasion Resistance of Organic Coatings by the Taber Abraser8 E 60 Practice for Photometric Methods for Chemical Analysis of Metals9 E 156 Test Method for Determination of Phosphorus in High-Phosphorus Brazing Alloys (Photometric Method)10 E 352 Test Methods for Chemical Analysis of Tool Steels and Other Similar Medium-and High-Alloy Steel9 F 519 Test Method for Mechanical Hydrogen Embrittlement11 G 5 Practice for Standard Reference Method for Making Potentiostatic and Potentiodynamic Anodic Polarization Measurements12 G 31 Practice for Laboratory Immersion Corrosion Testing of Metals12 G 59 Practice for Conducting Potentiodynamic Polarization Resistance Measurements12 G 85 Practice for Modified Salt Spray (Fog) Testing12 2.2 Military Standards: MIL-R-81841 Rotary Flap Peening of Metal Parts13 MIL-S-13165 Shot Peening of Metal Parts13 MIL-STD-105 Sampling Procedures and Tables for Inspection by Attribute13 2.3 ISO Standards: ISO 4527 Autocatalytic Nickel-Phosphorus Coatings— Specification and Test Methods14 3. Terminology 3.1 Definition: 3.1.1 significant surfaces—those substrate surfaces which the coating must protect from corrosion or wear, or both, and that are essential to the performance. 3.2 Other Definitions—Terminology B 374 defines most of the technical terms used in this specification. 4. Coating Classification 4.1 The coating classification system provides for a scheme to select an electroless nickel coating to meet specific performance requirements based on alloy composition, thickness and hardness. 4.1.1 TYPE describes the general composition of the deposit with respect to the phosphorus content and is divided into five categories which establish deposit properties (see Table 1). NOTE 1—Due to the precision of some phosphorus analysis methods a deviation of 0.5 % has been designed into this classification scheme. Rounding of the test results due to the precision of the limits provides for an effective limit of 4.5 and 9.5 % respectively. For example, coating with a test result for phosphorus of 9.7 % would have a classification of TYPE V, see Appendix X4, Alloy TYPEs. 4.2 Service Condition Based on Thickness: 4.2.1 Service condition numbers are based on the severity of the exposure in which the coating is intended to perform and minimum coating thickness to provide satisfactory performance (see Table 2). 4.2.2 SC0 Minimum Service, 0.1 µm—This is defined by a minimum coating thickness to provide specific material properties and extend the life of |
