ASTM B Standard Guide for Post-Coating Treatments of Steel for Reducing the Risk of Hydrogen Embrittlement. ASTM B Standard Guide for Post-Coating Treatments of Steel for Reducing_ 化学_自然科学_专业资料。后电镀产品处理,降低氢脆的风险标准. Buy ASTM B R GUIDE FOR POST-COATING TREATMENTS STEEL FOR REDUCING THE RISK OF HYDROGEN.
|Published (Last):||22 May 2007|
|PDF File Size:||15.71 Mb|
|ePub File Size:||5.95 Mb|
|Price:||Free* [*Free Regsitration Required]|
Ast, 1—The heat treatment does not guarantee complete freedom from the adverse effects of hydrogen degradation. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
Link to Active This link will always route to the current Active version of the standard. Historical Version s – view previous versions of standard.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer.
ASTM B850 – 98(2015)
This phenomenon often occurs in alloys that show no signi? I’m an engineer trying to write good drawing notes for plating requirements. Current edition approved April 1, They do not apply to any other standard. It is recommended that the tensile strength be supplied by the purchaser.
ASTM B Standard Guide for Post-Coating Treatments of Steel for Reducing_百度文库
It is informational only and not an official part of h850 standard; the full text of the standard itself must be referred to for its use and application. No other units of measurement are included in this standard.
This guide covers the standard procedure of performing post-coating heat treatment of some steels for reducing susceptibility to hydrogen embrittlement or degradation that may arise in the finishing processes. Hi Richard, If the high temperature treatment cannot be done within a reasonable time at least within 4 hours of plating then the embrittlement relief bake needs to be done first.
A number in parentheses indicates the year of last reapproval.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
I figure that if I ask a plater to plate a part per a specification, the least I can do is read the specification and give them all of the ordering information they need to plate our parts per the specification.
ASTM B Class 3 post heat treatment vs. ASTM B embrittlement relief
For steels of actual tensile strength below MPa, heat treatment after plating is not essential. Additionally, the selection of electroplating solutions with high cathodic efficiencies is recommended for 2. Embrittlement Relief Treatment Classes 5. Thanks for your help.
ASTM B733 Class 3 post heat treatment vs. ASTM B850 embrittlement relief
Except for surface-hardened and shot-peened parts, the choice of embrittlement-relief heat treatment and the corresponding treatment conditions shall be selected on the basis of actual tensile strength of the steel. Preparation involving cathodic treatments in alkaline or acid solutions shall be avoided.
Because of factors such as alloy composition and structure, type of coating, coating thickness, size, mass, or design parameters, some parts may perform satisfactorily with no embrittlement-relief adtm.
So, generally it is hydrogen embrittlement relief bake first and heat asttm second. If I am coating primarily for corrosion protection, I can select a class 3 post heat treatment to improve adhesion and to provide for hydrogen embrittlement relief.
This heat treatment procedure shall be used after plating operations but prior to any secondary conversion coating operation. Which of these would be performed first? The hydrogen can be introduced during cleaning, pickling, phosphating, electroplating, autocatalytic processes, porcelain enameling, and in the service environment as a result of cathodic protection aztm or corrosion reactions.
NOTE 3—The use of inhibitors in acid pickling aastm may not minimize hydrogen embrittlement. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
From beautiful Pine Beach New Jersey: Last previous edition approved in as B —