On increase of lifetime of ship’s propeller shaft

Application of metal-plating anti-wear additives is regarded as one of the most promising areas to reduce wear and tear of friction couplings, including the work of the propeller shaft of the vessel. During the studies the patented metal-plating anti-wear additive on the magnetic base was first added into the grease. Application of magnetic additive has reduced the wear rate in 1,5–3 times, de-pending on the brand of oil, load and temperature in the friction zone. To im-prove the additives of this type and the creation of new there were developed and patented the devices, evaluating the lubricity of hydrocarbon liquids, taking into account the effect of physical parameters of the magnetic field on the efficiency of the additives: a tribometer with a permanent magnet and a tribometer with al-ternating electromagnetic field.