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Corrosion protection properties summarised in Tables VI-VIII and shown in Figures 12-14 showed that:
1   all paint films derived from the formulation groups showed excellent filliform corrosion resistance, showing corrosion only in the scratched area; and
2   paint films containing 3Fe2O3: 1Al2O3 and 1Fe2O3: 3Al2O3 showed the highest resistance, while a lower resistance was imparted by films containing 1Fe2O3: 1Al2O3 and Fe2O3.
Such observations may be attributed to the fact that both iron
oxide and aluminium oxide have the same chemical formula, i.e. one can replace the other in its crystal lattice easily exhibiting a synergistic effect, where a pure solid solution is formed, with a homogeneous texture.
  In the case where there is a presence of one of the two oxides at a higher concentration than the other in the solid solution, good corrosion resistance results. Both iron oxide and alumina exhibited a barrier effect. At their presence in equal concentrations, the anticorrosion protection properties showed lower values. This may be attributed to the fact that their barrier effects contradict each other. At presence of one of the two components in a higher concentration than the other, its barrier effect prevails allowing the formation of a stable complex with steel substrate to be formed giving a better anticorrosion protection effect.

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篮球少年: 金币+10, 翻译EPI+1, ★★★很有帮助 2014-09-23 09:44:56
总结于表 VI-VIII和图12-14的防腐蚀保护性表明:
1、从各组配方得到的所有涂膜都具有优异的防蚀性,腐蚀仅出现在划痕处;
2、含有 3Fe2O3: 1Al2O3和1Fe2O3: 3Al2O3 的涂膜防腐性能最高,而含1Fe2O3: 1Al2O3和Fe2O3者则防腐能力较低。
这样的观察可能是由于这样的事实,就是铁氧化物和氧化铝两者具有相同的化学式,即二者在其晶格中可以很容易的互相替代,且表现出了协同作用,形成一种纯固溶体,具有均匀的纹理。
在固液相中,当两种氧化物中的一种的浓度更高时,其耐腐蚀性结果良好。氧化铁和氧化铝二者均具有屏障作用。当它们的浓度相同时,其防腐保护特性较低。这可能归因它们的相互茅盾的屏障作用。当一种浓度高于另一种浓度时,屏障作用占优势者可以允许与钢基体形成一稳定的复合物,从而得到更好的防腐蚀保护作用。
2楼2014-09-22 22:39:28
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