What are the main reasons for the rust of hand chain hoists?

What are the main reasons for the rust of hand chain hoists?

As a common lifting equipment, hand chain hoists are widely used in various fields. However, hand chain hoists often rust during use, which not only affects its appearance, but more importantly, it will reduce its performance and service life, and even bring safety hazards. Understanding the main reasons for the rust of hand chain hoists will help us take effective prevention and solution measures to ensure its normal operation.

1. Environmental factors
1. Humid environment
When hand chain hoists are used or stored in a humid environment, water vapor in the air will form a water film on its surface, which provides conditions for the oxidation reaction of the metal and accelerates the rusting process. Especially in the rainy season in the south or in coastal areas with high humidity, hand chain hoists are more susceptible to erosion by humid air.
2. Corrosive environment
If the hand chain hoist is in an environment containing chemical corrosive substances for a long time, such as acid mist, alkali vapor, salt, etc., these substances will react chemically with the metal surface, destroy the metal's protective layer, and cause the metal to rust. For example, if hand chain hoists are used in chemical plants, seaside and other environments, the risk of rust will increase significantly.
3. High temperature environment
High temperature environment will also accelerate the rusting process of hand chain hoists. Under high temperature conditions, the chemical activity of metal materials is enhanced, and it is easier to react with oxygen, water vapor, etc. in the air. In addition, high temperature will reduce the effectiveness of protective measures such as lubricants, further exacerbating the possibility of rust.

2. Improper use and maintenance
1. Lubricant failure
The chain and transmission parts of the hand chain hoist need to be lubricated regularly to reduce friction and prevent rust. If the lubricant used is of poor quality, expired and deteriorated, or the lubricant is unevenly applied and insufficient, the metal surface will be exposed to the air and unable to form an effective protective layer, thus causing rust.
2. Untimely cleaning
During use, the surface and internal parts of the hand chain hoist will be contaminated with impurities such as dust, dirt, and oil. If these impurities are not cleaned in time, they will react with the metal surface, destroy the metal's protective layer, and cause rust. Especially in harsh working environments, such as construction sites and mines, cleaning is particularly important.
3. Long-term non-use
When the hand chain hoist is not used for a long time, if proper protective measures are not taken, such as applying anti-rust oil, storing in a dry and ventilated place, etc., the metal surface will gradually lose its luster, become dry, and be easily corroded by oxygen and water vapor in the air, causing rust.
4. Surface paint is damaged
The surface of the hand chain hoist is usually coated with a layer of paint or anti-corrosion coating to protect the metal from corrosion. If the paint layer is scratched, worn or peeled off during use, the metal surface will be directly exposed to the air and prone to rust. Especially during transportation, installation and use, if you do not pay attention to protection, it is easy to cause damage to the paint layer.

III. Material and design issues
1. Material quality
The material of the hand chain hoist has an important influence on its anti-corrosion ability. If the metal material used is of poor quality, such as too high carbon content, unreasonable alloy composition, etc., its corrosion resistance will be poor and easy to rust. In addition, if there are defects in the material during the production process, such as inclusions, pores, etc., it will also reduce its anti-corrosion ability.
2. Design defects
Some chain hoists may have design defects, such as poor drainage and ventilation, which will cause moisture and humidity to accumulate inside the equipment and increase the risk of rust. For example, if the outer shell of the chain hoist is not tightly sealed, rain or moisture can easily enter the interior, causing the internal parts to rust.
Rusting of chain hoists is a complex problem involving the combined effect of multiple factors. In order to effectively prevent the chain hoist from rusting, we need to take comprehensive protective measures from multiple aspects such as environment, use and maintenance, materials and design. Only in this way can we ensure the normal operation of the chain hoist, extend its service life and ensure production safety.