Abstract
ABSTRACTIn bearing structures of automobile dump truck semi-trailers engaged in the transport of agricultural goods, mineral fertilizers, a large part of metal structures is under the direct influence of aggressive environments in combination with dynamic loads that arise when driving on roads. The peculiarities of corrosion processes when contacting steel surfaces of dump semi-trailers with mineral fertilizers, as well as their aqueous solutions, are insufficiently studied. Also studied mechanisms of electrochemical corrosion of materials of metal structures of agricultural vehicles to ensure their performance in conditions of prolonged aggressive environments. The authors determined that the mineral fertilizer medium is the most aggressive material used in cargo transportation in the agrarian sector mineral fertilizer and ammonium sulphate cause intense corrosion damage of typical materials of metal structures of automobile dump-carriers, which adversely affects reliability. The obtained results allow a better understanding of the causes of agricultural machines corrosion and can be used in assessing their residual resource.
Highlights
In bearing structures of automobile dump semi-trailers used in the transport of agricultural goods, mineral fertilizers, a large part of metal structures is under the direct influence of aggressive environments in combination with dynamic loads that arise when driving on roads [1,2]
The most corrosive-active among mineral fertilizers are nitrophosphate and ammonium sulphate, less aggressive are ammonia water, and humidity is a catalyst for corrosion processes [5]
The electronic picture of samples surfaces made of high-quality steel after exposure for 24 days in rainwater model, nitrophosphate and ammonium sulphate detects differences in the form of corrosion damages: ammonium sulphate causes deeper and wider pittings and pits compared to distilled water
Summary
In bearing structures of automobile dump semi-trailers used in the transport of agricultural goods, mineral fertilizers, a large part of metal structures is under the direct influence of aggressive environments in combination with dynamic loads that arise when driving on roads [1,2]. This leads to significant corrosion and corrosion-fatigue damage. The massive losses of steel metal in the transport sector are negligible, but the technical state of the corroded parts negatively affects overall reliability, with the combination of corrosion factors and cyclic loads having the greatest danger [3,4]. The obtained results allow better understanding of the causes of corrosion of elements of agricultural machines and can be used in assessing their residual resource
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