In marine transportation and offshore operations, ships are indispensable and important tools. Due to long-term exposure to seawater, salt fog and other harsh environments, the corrosion protection requirements for ships are extremely high. As a small part in shipbuilding, the handle is also facing the problem of corrosion. If a small handle is damaged due to corrosion, it may affect the operating experience, or it may cause safety hazards. This paper will discuss in detail the "corrosion-resistant handle of shipbuilding equipment".

1. The importance of corrosion-resistant handle

First of all, let's understand why we need to pay attention to the corrosion resistance of the handle. As one of the most commonly used operating parts on the ship, the handle will frequently come into contact with human hand sweat and salt in the environment during daily use, and it is easy to produce rust or chemical reaction. In addition, because its installation position is usually special (such as cabin door handle), it is difficult to replace it quickly once it is damaged, which not only brings inconvenience to users, but may even lead to the situation that the door cannot be opened normally to escape in an emergency.

Step 2 choose materials

At present, there are three main types of handles used in the market: stainless steel, copper alloy and plastic:

Stainless steel: it has the advantages of high strength and good surface finish, which can effectively avoid allergic reactions caused by metal ions contacting with human body; The disadvantage is that the price is expensive.

Copper alloy: compared with stainless steel, it is more economical and has better thermal conductivity and fatigue resistance;

Plastic: Although the cost is low, it is easy to scratch and wear because of its low hardness, and it is not resistant to high temperature and is not conducive to cleaning and maintenance.

Based on the above analysis results, stainless steel or copper alloy handles are more suitable for ships that need to be subjected to seawater erosion tests frequently.

Step 3 design the structure

In order to improve the service life of the handle and ensure the safe and reliable completion of the task, the designer should also pay attention to the following points:

A) Minimize the number of grooves to reduce the probability of harboring dirt;

B) Increase the raised part to help the fingers hold it firmly;

C) Anti-skid lines are arranged to enhance friction and prevent slipping and falling;

D) The installation method should be firm and firm to avoid shaking and falling off.

4. Process treatment

In addition to material selection, good technology is also an indispensable part to ensure the quality of the handle. Several commonly used methods include electroplating, oxidation, spraying and so on.

Electroplating can form a uniform and dense protective layer on the metal surface, thus achieving anti-corrosion effect;

Oxidation treatment plays a protective role by forming a dense and stable oxide film on the surface of aluminum parts;

Spraying technology is suitable for parts with complex shapes and can cover all parts comprehensively.

To sum up, in order to meet the demand of maritime industry for high-quality handles, manufacturers should comprehensively consider and improve from three aspects: material selection, design structure optimization and post-processing. Only in this way can we truly realize the goal of "great use of small parts" and contribute to the development of navigation in China and even around the world!

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