Optimization of the formation technology of tripolyphosphate coating on mild steel

Tripolyphosphate conversion coatings are promising due to the active type of anti-corrosion protection. However, be introduced into production, it is necessary optimize technology tripolyphosphate coating deposition. Coatings were deposited samples st05kp cold-rolled sheet steel (analogs G10050, G10060, 1CR, 2CR, D6-2, DG-2) from aqueous solutions sodium (4 %, 6 10 12 14 %) at t=80 °C by dip and sputtering. The specific weight morphology determined. corrosion-protective capability was studied in G-4 climatic chamber 90 100 % humidity using Akimov's test. prospects sputtering methods shown. It revealed that method, 1–4 g/m2 increased linearly a rate 0.3–0.35 1 (wt.) Na5P3O10. For 4–8 Na5P3O10, growth 0.2 Na5P3O10 exceeded obtained accelerated oxygen access formation rate. At 10–14 0.55–0.65 lower than self-compaction iron matrix decreased mass filler. Using corrosion testing methods, optimum concentration obtain with highest %–10 (wt.). correlation protective defects cracks