Hydraulic Cylinder Tube/Honed Tube Usage Problems Part 2 - Corrosion and Pitting Damage
Release time:
2026-04-01
The hydraulic cylinder barrel is the core pressure-bearing and guiding component of the hydraulic cylinder. It operates under high pressure and high-frequency reciprocating motion for extended periods, and its working condition directly determines the operational stability of the entire hydraulic system. In actual use, influenced by factors such as operating conditions, hydraulic fluid, installation, and maintenance, the cylinder barrel is prone to various types of damage and failure. The following are some of the most common core problems:
Corrosion and Pitting Damage
- These problems are particularly prominent in humid and highly corrosive working environments, such as underground mining, marine operations, and chemical equipment.
Problem Manifestations
- Rust spots and localized pits appear on the inner wall of the cylinder barrel. In severe cases, continuous honeycomb-like corrosion areas form, significantly increasing surface roughness and causing the originally mirror-like inner wall to lose its luster.
Cause Analysis
- - A humid working environment, or the presence of water, acidic/alkaline corrosive media, etc., in the hydraulic oil, leads to electrochemical corrosion of the cylinder inner wall.
- - Pitting corrosion may occur under certain operating conditions. These tiny corrosion pits can become the initiation source of subsequent fatigue cracks, accelerating cylinder failure.
Impact
- Corrosion completely destroys the mating surfaces between the cylinder and seals, leading to seal failure and leakage. It also reduces the structural strength of the cylinder, significantly increasing the risk of cylinder cracking and shortening the overall service life of the hydraulic cylinder.
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