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首页> 美国政府科技报告 >Advanced zinc phosphate conversion and pre-ceramic polymetallosiloxane coatings for corrosion protection of steel and aluminum, and characteristics of polyphenyletheretherketone-based materials. Final report
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Advanced zinc phosphate conversion and pre-ceramic polymetallosiloxane coatings for corrosion protection of steel and aluminum, and characteristics of polyphenyletheretherketone-based materials. Final report

机译：先进的磷酸锌转化和预陶瓷聚金属硅氧烷涂料，用于钢和铝的防腐蚀，以及聚苯醚醚酮基材料的特性。总结报告

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摘要

Anhydrous zinc phosphate (Zn(center dot)Ph) coatings deposited by immersing the steel in transition Co, Ni, and Mn cation-incorporated phosphating solutions were investigated. Two features for the anhydrous 340C-heated (Zn(center dot)Ph) were addressed; one was to determine if electron trapping of adsorbed CO(sup 2+) and Ni(sup 2+) ions acts to inhibit the cathodic reaction on the (Zn(center dot)Ph), and the second was to determine the less susceptibility of the (alpha)-Zn(sub 3)(PO(sub 4))(sub 2) phase to alkali-induced dissolution. The factors governing film-forming of pre-ceramic polymetallosiloxane (PMS) coatings for Al substrates were investigated. Four factors were important in obtaining a good film: (1) formation of organopolymetallosiloxane at sintering temperatures of 150C; (2) pyrolytic conversion at 350C into an amorphous PMS network structure in which the Si-O-M linkage were moderately enhanced; (3) noncrystalline phases; and (4) formation of interfacial oxane bond between PMS and Al oxide. Formation of well-crystallized polyphenyletheretherketone (PEEK) in vicinity of silica aggregates was found in the molted body made in N(sub 2). Crystalline PEEK contributed to thermal and hydrothermal stabilities of mortar specimens at temperatures up to 200C, and resistance in 5 wt % H(sub 2)SO(sub 4) solution at 80C.

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