8
Aug.
05, 2025
10
Aug.
01, 2025
11
Aug.
01, 2025
14
Aug.
01, 2025
19
Jul.
31, 2025
details on a specific fastener type or standard
Alternative Coatings (Preventive Approach)
Zinc Flake Coatings (e.g., Dacromet, Geomet): No hydrogen generated during application.
Mechanical Galvanizing: Zinc particles cold-welded to the fastener (no acid pickling or electroplating).
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20
Jul.
31, 2025
Detailed Hydrogen Removal Methods
5. Stainless Steel Fasteners (A2/A4, ASTM F593)
Risk: Less prone to embrittlement but still vulnerable after pickling.
Removal Methods:
Low-Temp Baking: 150–200°C (302–392°F) for 4–6 hrs (avoids sensitization).
Passivation Alternatives: Nitric acid passivation (reduces hydrogen vs. electrolytic).
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