Anti-corrosion of pistons

Piston is an important part of the engine, reciprocating motion in the cylinder, by the connecting rod and the crankshaft into a circular motion after the power output. If the piston is rusted, there will be a decrease in engine power, resonance, cylinder pulling and other phenomena, so it should be rust-proof before assembly.

The main body of the piston is mostly made of silicon-aluminium alloy, which is prone to rusting in humid environments due to the silicon element and is shaped as a grey powder. Piston set on the piston ring, the material is mostly alloy cast iron, containing more easy to rust carbon, silicon, manganese and other elements, in a humid environment, and the main body of the piston in the narrow space is prone to produce condensation, corrosion will occur.

The most susceptible part to rust is the piston ring, followed by the piston pin hole. Sometimes, the piston will be assembled with the connecting rod, at this time the connecting rod becomes the most easy to rust except the piston ring. Rust prevention of the piston, focusing on moisture, if then combined with the gas phase rust prevention, rust prevention efficiency increases greatly, is currently the most commonly used and most effective rust prevention measures. Substances that make metals rust are water, oxygen, sulphur dioxide, chlorine, etc. When there is no rust protection, these substances can cause corrosion. When there is no rust protection, these substances are in direct contact with the metal, followed by corrosion reactions, and after a certain period of time they can produce rust visible to the naked eye.

The main measure to prevent moisture is the use of desiccant, which can absorb water, the humidity inside the package to a lower level will not be easy to produce condensation, corrosion reaction is not easy to occur. The anti-rust gas volatilised by the gas-phase antirust material can be closely adsorbed on the surface of the metal, and the corrosive gases such as rust-causing gaseous water, oxygen, sulphur dioxide and chlorine can be separated from the metal, thus avoiding the occurrence of corrosion.

B+Z gives the appropriate antirust solutions depending on the antirust period:

For rust prevention of less than 1 month, B+Z M3 VCI bags can be used. 1-3 months rust prevention requires the addition of montmorillonite or a highly hygroscopic desiccant.

For rust prevention of 3-6 months, it is not only necessary to increase the thickness of antirust bag, but also recommended to use high hygroscopic desiccant. Greater than 6 months of rust prevention, to use U-shaped rust prevention paper on top of the former.

In all solutions, the rust protection bags are sealed tightly to not only prevent the leakage of rust protection gases, but also to reduce the entry of external moisture into the package.

B+Z's rust prevention solutions do not affect the original transport and storage methods of the products, and the lightweight oil-free rust prevention solutions better protect your workpieces.