ZIMEX|Industrial Packaging | Freedom from corrosion, vapour phase rust prevention solutions for engine connecting rods
Connecting rod is an important part of the
engine, used to connect the piston and crankshaft, can change the reciprocating
motion of the piston into the rotary motion of the crankshaft, so it is subject
to greater compression and tension forces. This requires connecting rods with
high mechanical strength and toughness, connecting rods are mostly made of
medium carbon steel, medium carbon alloy steel and other materials to meet the
requirements.
There are 2 areas on the connecting rod that are prone to rust：
Threads and bolts at large ends. Threads rust because rust-causing aqueous machining fluids and cleaning agents are left behind during the tapping and cleaning process, and bolts are similarly corroded when they are assembled and attached to the threads.
Sockets. The hole in the small end of the connecting rod is inlaid with a brass sock,
mostly of wear-resistant phosphor bronze, containing phosphorus elements
causing easy discolouration and corrosion.
B+Z Rustproof film style specially tailored for connecting rods for quick sealing and warehousing
B+Z recommends more cost-effective vapour phase rust prevention
solutions for different rust protection periods
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Rust proof within 3 months
Gas phase antirust bag with the use of magnesium chloride desiccant, in the case of a well sealed bag, the desiccant will be fully absorbed inside the bag, antirust bag volatile gas on the surface of the connecting rod to form a protective layer of gas will be separated from oxygen and the connecting rod, to achieve the effect of rust prevention.
B+Z also recommends the use of Rust Preventive Oil A, a thin, dry, solvent evaporated rust preventive oil that can be packaged in a common plastic bag to achieve rust prevention.
Desiccant and antirust film are used together
for better rust prevention.
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Rust protection for 3-6 months
Antirust paper and magnesium chloride desiccant can provide longer antirust period. Compared with anti-rust bag (film), anti-rust paper contains more gas-phase anti-rust components and releases anti-rust gas faster, which can make the package quickly filled with anti-rust gas and form more timely and effective anti-rust protection. In addition, the concentration of antirust gas in the antirust paper package is higher, which can form a thicker gas protective layer on the surface of the connecting rod, and the antirust effect is better.
The B+Z KU range of antirust papers offers enhanced rust protection for ferrous and non-ferrous metals, and is chip-resistant, flexible and unbreakable.
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Rust proof for more than 6 months：
It is recommended to use a combination of antirust oil, antirust bag and magnesium chloride desiccant to prevent rust, and in the coastal belt where the air is humid and in the rainy season, antirust paper should also be used.
The rust prevention effect varies depending on the metal material, processing, cleaning and packaging process. B+Z's anti-corrosion solutions are qualified by wet heat test and actual storage environment before batch packaging, which minimises your risk and is more cost-effective.