5
Aug.
05, 2025
7
Aug.
01, 2025
8
Aug.
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11
Aug.
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16
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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17
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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18
Jul.
31, 2025
Hydrogen removal method for electroplated dental implant products
ASTM F2129 (Cyclic Polarization):
Detects hydrogen susceptibility in simulated body fluid (SBF).
Slow Strain Rate Test (ASTM E8/E292):
Tests delayed fracture risk under tension.
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19
Jul.
31, 2025
Nitinol shape memory alloy, PEEK-coated screw dehydrogenation method
Risk: Hydrogen absorption during electropolishing, acid pickling, or plating can cause brittle fractures and loss of shape memory effect.
Dehydrogenation Methods:
A. Low-Temperature Vacuum Annealing (Best for Medical Nitinol)
Temperature: 300–400°C (572–752°F) (below phase transformation temp to avoid altering shape memory).
Time: 2–4 hours (longer for thicker components).
Vacuum Level: ≤10⁻⁵ m
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20
Jul.
31, 2025
5 Costly Mistakes to Avoid When Maintaining Carton Die-Cutting Machines
Keep your production running smoothly and avoid expensive downtime with these essential maintenance tips.
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