Neoprene Bonded Sealing Washers

The Neoprene Bonded Sealing Washers produced by the Xiaoguo® factory are easy to install and provide a perfect seal at one time. No additional gaskets or adhesives are required, saving assembly time for the workers.

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Product Description

The surface treatment of the metal framework of the Neoprene Bonded Sealing Washers is a process carried out on the metal part of the washer. The main purpose of this treatment is to prevent corrosion and to distinguish the appearance.

（1）Zinc Plated

The most common and cost-effective option provides the basic rust prevention capability for low-carbon steel.

（2）Plain

The bare metal surface without any additional coating, that is, the smooth surface of the metal itself.

（3）Passivated

A chemical treatment, mainly used for stainless steel, is designed to remove free iron from the surface and maximize the inherent corrosion resistance of the material.

Neoprene Bonded Sealing Washers

（4）Zinc Phosphate

As the base layer for paints or coatings, it provides excellent adhesion and a fundamental anti-corrosion effect.

（5）Zinc-Nickel

It offers 3 to 5 times higher corrosion protection depth than pure galvanization, but at a higher cost.

（6）Zinc Flake

No risk of hydrogen embrittlement, excellent corrosion resistance.

（7）Dacromet

High-performance, environmentally friendly zinc-aluminum sheet coating. The Neoprene Bonded Sealing Washers treated with Dacromet surface treatment are widely used in automotive, wind power and other industrial applications with high corrosion resistance requirements.

（8）PVD/CrN

Chromium nitride (CrN) and other coatings are formed on the metal surface through physical vapor deposition technology, which is mainly used in scenarios requiring high wear resistance.

（9）Anodized

This is only applicable to aluminum Neoprene Bonded Sealing Washers. It increases the oxide layer through electrochemical means, thereby enhancing wear resistance and corrosion resistance.

Neoprene Bonded Sealing Washers

Mon	φ27	φ30	φ33	φ36	φ39	φ42	φ45	φ48	φ52	φ56	φ60
d max	27.365	30.395	33.395	36.395	39.395	42.395	45.395	48.395	52.53	56.53	60.53
d min	27.035	30.005	33.005	36.005	39.005	42.005	45.005	48.005	52.07	56.07	60.07
dc max	36.395	39.395	42.395	45.395	48.395	52.53	56.53	60.53	64.23	68.23	72.23
dc min	36.005	39.005	42.005	45.005	48.005	52.07	56.07	60.07	63.77	67.77	71.77
h max	2.2	2.2	2.2	2.2	2.2	2.2	2.2	2.2	2.2	2.2	2.2
h min	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8

（1）Which surface treatment method can provide the best anti-corrosion effect?

For carbon steel Neoprene Bonded Sealing Washers, zinc-nickel alloy and Geomet have the highest corrosion resistance.

（2）Does surface treatment affect the bonding effect between rubber and metal?

Yes, it does and it is very important. Before the bonding process, the metal surface must be clean and undergo appropriate pre-treatment. Some surface treatment methods, such as zinc phosphate treatment, will be used as the basis for bonding.

（3）Can the metal gasket be painted (for example, painted black, yellow, or green)?

The rubber part is usually black neoprene, but the metal washer can be coated with colored surface coatings, such as black paint, yellow zinc powder, or green zinc sheet.