阀杆采用不锈钢，有良好的抗腐蚀性，抗擦伤和耐磨性能。

The valve axis adopt stainless steel, it has good abradability and anti-causticity.

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阀杆经调质及表面氮化处理，有良好的抗腐蚀性及抗擦伤性。

The surface and the adjusting media of the valve shaft are nitrogenized so that it is erosion and abrasion resistant.

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结果表明，石墨良好的抗腐蚀性将保护换热管不受熔融铝-硅合金的腐蚀。

The results show that graphite with good corrosion resistance can protect the heat-exchange tube from the corrosion of molten Al-Si alloy.

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