Cracking the Corrosion Code: Anti-Corrosion Treatments for D

[Abstract]:Ordinary Atmospheric Environment: Includes urban buildings and outdoor billboards, mainly affected by oxygen, moisture, and dust. The corrosion rate is relatively slow.

1. Classification of Common Corrosive Environments

Ordinary Atmospheric Environment: Includes urban buildings and outdoor billboards, mainly affected by oxygen, moisture, and dust. The corrosion rate is relatively slow.
Humid / Marine Environment: Coastal facilities and aquatic equipment face high humidity and salt content, which accelerate electrochemical corrosion, making this a severe hotspot for rust.
Acidic & Alkaline Chemical Environment: Chemical workshops and laboratory equipment are exposed to acidic or alkaline gases and liquids that directly trigger chemical corrosion, destroying the fastener material.

2. Selection of Corresponding Anti-Corrosion Processes

For Ordinary Atmospheric Environments: Hot-dip galvanizing is the priority choice. Fasteners are immersed in molten zinc to form a uniform zinc coating. It offers low cost and long-lasting protection (5-10 years), making it ideal for building brackets and appliance housing bolts.
For Humid / Marine Environments: Use stainless steel materials (316 stainless steel offers optimal salt resistance) combined with passivation treatment, or opt for Dacromet coatings (zinc-aluminum composite). These can withstand over 5000 hours in salt spray tests, perfectly suiting offshore platforms and marine equipment fasteners.
For Acidic & Alkaline Chemical Environments: Choose Polytetrafluoroethylene (PTFE) coatings or Hastelloy alloys. PTFE coatings provide excellent acid and alkali resistance, while Hastelloy is designed for extreme corrosive conditions, such as connection bolts on chemical reactor vessels.

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Cracking the Corrosion Code: Anti-Corrosion Treatments for D

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