1.車身表面鏽裂鏽爛原因
①道路不平引起車身顛簸振動
②發動機運轉引起的振動等，使各連接件脫焊或裂開。
③由於日照和嚴寒引起油漆表面龜裂
④車身薄鋼板受水汽侵蝕，破壞了內外表面的防護層，使車身逐漸銹蝕等.
2.車身鏽爛修復方法
①用鋼絲刷或砂紙將損壞部位的油漆除掉，再根據損壞程度決定更換整塊飯金件還是修復損壞部分
修復提示:
如果損壞比較嚴重，最好進行整塊更換。如果損壞較輕，把受腐蝕而變疏鬆的金屬除掉。用錘子將孔邊向裡敲進，開成一輕度凹面，以便打膩子。用鋼絲刷將金屬表面的鏽屑除掉，再塗一層防銹漆以免再生銹。
②鋅砂適合用來補大孔，將鋅砂剪得跟孔的尺寸與形狀大致相同，然後把它貼在孔處，砂邊要比周圍領金部分低，再把填料抹在砂的周邊，然後才能填充填料，並重新噴漆
③薄鋁皮適合用來補小孔，將薄鋁皮剪成孔的尺寸和形狀，撕掉保護紙，將它貼在孔上，根據厚度需要可貼層或幾層，之後將其緊壓在金件上即可，最後填充填料和噴漆。
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1. Causes of rust cracking and rusting on the surface of the vehicle
①Bumping and vibration caused by uneven roads
②Vibration caused by engine operation, etc., which causes the connection parts to be welded off or cracked.
③Cracking of the paint surface due to sunlight and cold
④The thin steel plate of the car body is corroded by water vapour, which damages the protective layer of the inner and outer surface and causes the car body to rust gradually.
2. Rusting repair method
① Use a wire brush or sandpaper to remove the paint from the damaged area, and then decide whether to replace the whole piece of rice and metal parts or repair the damaged part according to the degree of damage.
Restoration tips.
If the damage is severe, it is best to replace the whole piece. If the damage is less severe, remove the metal that has been loosened by corrosion. Using a hammer, tap the edge of the hole inwards to create a slight concave surface for greasing. Use a wire brush to remove the rust from the surface and apply a rust inhibiting paint to prevent rust from returning.
②Cut the zinc sand to roughly the same size and shape as the hole and stick it to the hole, with the sand edge lower than the surrounding collar, then smear the filler around the sand, before filling the filler and repainting.
③Cut the thin aluminium sheet to the size and shape of the hole, remove the protective paper and stick it over the hole in as many or as many layers as necessary, then press it firmly onto the metal part.
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