ASTM B650-95(2018) - 1.6.2018
 
1. Scope

1.1 This specification covers the requirements for electrodeposited chromium coatings applied to ferrous alloys for engineering applications.

1.2 Electrodeposited engineering chromium, which is sometimes called “functional” or “hard” chromium, is usually applied directly to the basis metal and is much thicker than decorative chromium. Engineering chromium is used for the following:

1.2.1 To increase wear and abrasion resistance,

1.2.2 To increase fretting resistance,

1.2.3 To reduce static and kinetic friction,

1.2.4 To reduce galling or seizing, or both, for various metal combinations,

1.2.5 To increase corrosion resistance, and

1.2.6 To build up undersize or worn parts.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

 
2. Referenced Documents

F1459-06(2017)

Standard Test Method for Determination of the Susceptibility of Metallic Materials to Hydrogen Gas Embrittlement (HGE)

B487-20

Standard Test Method for Measurement of Metal and Oxide Coating Thickness by Microscopical Examination of Cross Section

MIL-S-13165

Shot Peening of Metal Parts Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.

B177-01

Standard Guide for Engineering Chromium Electroplating

B183-18(2022)

Standard Practice for Preparation of Low-Carbon Steel for Electroplating

B242-99(2020)

Standard Guide for Preparation of High-Carbon Steel for Electroplating

B320-60(2019)

Standard Practice for Preparation of Iron Castings for Electroplating

B374-21

Standard Terminology Relating to Electroplating

B117-19

Standard Practice for Operating Salt Spray (Fog) Apparatus

B499-09(2021)e1

Standard Test Method for Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on Magnetic Basis Metals (Includes all amendments and changes 5/18/2021).

B504-90(2023)

Standard Test Method for Measurement of Thickness of Metallic Coatings by the Coulometric Method

B507-14(2021)

Standard Practice for Design of Articles to Be Electroplated on Racks

B568-98(2021)

Standard Test Method for Measurement of Coating Thickness by X-Ray Spectrometry

B571-23

Standard Practice for Qualitative Adhesion Testing of Metallic Coatings

B602-21

Standard Guide for Attribute Sampling of Metallic and Inorganic Coatings

B697-88(2021)

Standard Guide for Selection of Sampling Plans for Inspection of Electrodeposited Metallic and Inorganic Coatings

B762-21

Standard Guide of Variables Sampling of Metallic and Inorganic Coatings

B849-02(2023)

Standard Specification for Pre-Treatments of Iron or Steel for Reducing Risk of Hydrogen Embrittlement

B850-98(2022)

Standard Guide for Post-Coating Treatments of Steel for Reducing the Risk of Hydrogen Embrittlement

D3951-18(2023)

Standard Practice for Commercial Packaging

E8-04

Standard Test Methods for Tension Testing of Metallic Materials