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This standard is issued under the fixed designation F ; the 1 This specification is under the jurisdiction of ASTM Committee F16 on. ASTM: F – Standard Specification for Chromium/Zinc Corrosion Protective Coatings for Fasteners. 1. Scope This specification covers the basic. ASTM F/FM Standard Specification for Zinc/Aluminum Corrosion Protective Coatings for Fasteners. standard by ASTM.

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Although hot-dip galvanize provides high thickness astk barrier protection 2 mils for substrates, it is not approved for use on high strength bolts because hot dip galvanize is susceptible of hydrogen embrittlement and cracking of fasteners that can result out in the field.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. No metric equivalents are presented in this specification.

Due to hydrogen embrittlement concerns ASTM recommends against hot-dip galvanizingmechanical deposition, or electroplating with zinc or other metallic coatings on high strength bolts ultimate tensile strengths that exceed ksi. That said, I do not know much about f113 coatings and how they are applied. I am using A grade BC and need a smooth finish with minimal irregularities. Work Item s – proposed revisions of this standard.

The bolts and nuts are already coated with Dacromet and the proposal is to coat the DTI washers with Magni We are not sure how fragile the coating astmm during installation. Consulting a structural engineer involved on the project is always the best solution.


High Strength Bolts Coatings

Hi, Recently we were informed that Dacromet coating astn being phased out. Parham- We cannot make specific recommendations, but I can say that painting A bolts is quite common. We assumed that the properties on the bolts is not affected but the final tension might be change?

Protective Coatings ASTM recommends that if a protective coating is required for A bolts, one of two approved coatings is recommended.

Is fluorocarbon coating acceptable to A bolts for corrosion prevention? Jovito- We would be happy to quote your specific bolting needs if you want to send us a list of the bolts you are looking for. Normally where I see F specified is in applications with higher strength fasteners that cannot be hot-dip galvanized, such as ASTM A heavy hex bolts. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.

Historical Version s – view previous versions of standard. But there are some doubts. Your first question, is it appropriate to specify ASTM F Grade 3would be best answered by an engineer familiar with the coating and the application. Link to Active This link will always route to the current Active version of the standard. Hello, We have specified A Dracomet coated bolts for a telecommunications monopole in Canada. Bandana- There are no issues mixing coatings with DTI washers.


What corrosion-resistant coatings are available for high-strength over ksi bolts?

High Strength Bolts Coatings – Portland Bolt

No other units of measurement are included in this standard. Is the coating that fragile?

However, these fasteners are not as readily available in the marketplace as A Type 1. Leave this field empty.

The basecoat can contain chrome C or be non-chrome NC. Pierre-Paul — The properties of the bolt and the final tension should not be impacted.

The coating process does not induce the possibility of internal hydrogen embrittlement provided that the fasteners have not been cleaned or pre-treated with aetm acid or phosphate. Leave a Reply Cancel reply Your email address will not be published. One year after installation the bolts are rusting. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.