Sprinkle the powder onto the rust spot and let sit for 10 minutes before wiping away with a damp sponge.

将研碎的粉末涂在锈斑上，并且保持10分钟，然后用潮湿海绵擦净。

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SEM observation showed that the surface of 1420 Al-Li alloy turn colors, and rust spot become bigger after salt corrosion.

电镜扫描观察发现，1420铝锂合金锈点直径较大，且连成片，表面明显变色。

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Experiments demonstrate that leaf spring crack results from rust spot as fatigue crack initiation, and in order to improve spring life it must be to improve coating quality.

通过试验证明了锈点是导致钢板弹簧断裂的新的疲劳源，为提高弹簧的使用寿命必须提高其涂层质量。

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Ohioans have long had a soft spot for heavy metal, which became more popular when the U.S. Rust Belt lost its manufacturing clout in the 1980s, scholars say.

WSJ: Heady Metal: Scholars Celebrate a Rock Genre's Cultural Bang