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Laboratory experiments were conducted on the erosion-corrosion resistance of four groups of austenitic cast iron with different nickel contents under different acidic slurry conditions. The experiments involved measuring weight loss, examining corrosion morphology as well as X-ray diffraction analysis and electrochemical techniques. While the results showed little erosioncorrosion in a base sand particles environment, erosion-corrosion increased progressively with additions of HCl solution. With the presence of H z , intergranular corrosion and pitting attacks were centred at the boundaries of graphite flakes and alloy carbides. The electrochemical tests showed that the enrichment of nickel and copper in low Ni austenite cast iron can increase the corrosion potential to some extent. As a result, the low Ni cast iron in which Ni content is 8?36 wt-%, and Mn content is 6?57 wt-% exhibited better corrosion resistance than other low Ni cast irons and demonstrated comparable performance with high Ni austenite cast iron.

The low ionic conductivity and mechanical strength are important factors impeding the application of solid polymer electrolytes. Herein, we design synthesize an organic/inorganic hybrid star-shaped polymer of octa­(poly­(methyl methacrylate)–poly­(poly­(ethylene glycol) methyl ether methacrylate) cage oligomeric silsesquioxanes (POSS–(PMMA–PPEGMEM)8) by one-step free atom transfer radical polymerization (ATRP), and compound with Li6.4La3Zr1.4Ta0.6O12 (LLZTO) to prepare a composite polymer electrolyte membrane (LP-CPEM). The star-shaped structure of the POSS–(PMMA–PPEGMEM)8 induced by octachloropropyl polyhedral cage oligomeric silsesquioxane (OCP-POSS) is beneficial to reduce the crystallinity of polymer and increase the movement of the polymer chain to form a continuous interconnected ion migration channel. The LLZTO fillers in the LP-CPEM could simultaneously hinder the orderly arrangement of polymer chains and provide other ion transport paths to increase the ion conductivity of LP-CPEM. The LP-CPEM with 7.5 wt % LLZTO has higher ionic conductivity of 3.8 × 10–4 S cm–1 at 30 °C and high mechanical strength (5.2 MPa). Additionally, Li/Li symmetric cells demonstrate stable constant current charging/discharging during 1000 h at 0.1 mA cm–2, and the all-solid-state batteries fabricated by the LP-CPEM exhibit good cyclic stability. It is promising for the development of next-generation high-safety all-solid-state lithium metal batteries.

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