Corrosion Resistance of Steel of the Frames of Boom Sprayers

We perform the comparative analysis of the corrosion resistance of St3ps steel in demineralized water and in saturated solutions of the Nurelle-D insecticide and UN-32 complex liquid fertilizer. It is shown that, in demineralized water, the general corrosion of the steel surface is predominant. In a solution of insecticide, parallel with general corrosion, we observe a partial realization of pitting corrosion. In a medium of mineral liquid fertilizer, we observe the passivation of the metal surface caused by phosphorus-containing corrosion inhibitors, which leads to the inhibition of the general corrosion. However, local violations of the passive state of the metal surface lead to the intense formation of corrosion pits, which is dangerous due to the possibility of their development accompanied by the initiation of cracklike defects in the structures.