Do you know the passivation treatment of stainless steel fasteners?

Stainless steel fasteners are indispensable parts in machinery, construction, automobiles, aviation and other fields. Their quality and performance are directly related to the operation and service life of the equipment. However, in practical applications, stainless steel fasteners are often corroded due to environmental factors. Passivation treatment, as a key technology in the manufacturing process of stainless steel fasteners, can not only improve the corrosion resistance of the product, but also extend its service life.

What is passivation?

Passivation is a chemical treatment method that treats the metal surface with a specific chemical solution to form a thin and dense oxide film. This oxide film can effectively isolate oxygen and moisture in the external environment, thereby preventing stainless steel bolts, nuts and washers from further oxidation or corrosion. For stainless steel fasteners, although they have a certain degree of corrosion resistance, after passivation treatment, a more stable chromium oxide layer will be generated on their surface, further enhancing their ability to resist corrosion.

Passivation process

1. Pre-cleaning: First, you need to thoroughly remove impurities such as oil, iron filings, etc. on the surface of stainless steel bolts and nuts to ensure the effect of subsequent passivation treatment.

2. Dip or spray passivation liquid: Soak the clean stainless steel fasteners in the passivation liquid for a period of time, or use a spray method to cover the entire surface.

3. Rinse and dry: After the passivation reaction is completed, rinse the residual passivator with clean water and dry it.

AOKE has many years of experience in stainless steel fasteners and committed to providing customers with the highest quality stainless steel fasteners. We strictly control every link from raw material selection to production process control to final surface treatment. Especially for the passivation treatment of bolts and nuts, we use advanced technology and equipment in strict accordance with international standards. If you are looking for reliable and durable stainless steel fasteners, please do not hesitate to choose us, you will get a value experience beyond your expectations!