請問有關飛機常見腐蝕情況有哪些?

親愛的 洋蔥,
MD90 Structural Repair Manual 51-10-03 敘述如下:
1. Intergranular corrosion is an attack on the grain boundaries of a material. Each of these tiny
grains has a clearly defined boundary, which from a chemical point of view, differs from the
metal within the grain center. The grain boundary and grain center can react with each other
as anode and cathode, similar to opposite poles of a battery when in contact with an
electrolyte or conductive medium.
4. Cracking of metal caused by the simultaneous effects of both stress and corrosion is known
as stress corrosion cracking. Stress corrosion manifests itself as a crack in the metal not
necessary accompanied by obvious corrosion. The stress can either be applied stress, or
one resulting from preloading the part during installation. Stress corrosion cracking occurs in
both aluminum and magnesium alloys as well as steel. It is usually recognized only after
cracking has occurred, and normally requires replacement of the part.
5. The most common type of corrosion on aluminum and magnesium alloys is pitting. Pitting
first appears as a white, powdery deposit. However, buffing the surface reveals tiny pits or
holes. In moderate to severe cases, the pits appear as well-defined hills and valleys when
viewed through a magnifying lens. In the case of slight pitting, the corrosion can be removed
by acid etch, cleaning, or buffing, as applicable.

2008-04-22 09:50:39 補充：
樓下的 子俊,
你是很好心啦! 但能否請你讀一下電腦翻譯出來的中文?
我們在講腐蝕耶~ 那來的穀類呀? 而且 attack 在化學裡有「氧化」的意思, 不能直譯為「攻擊」. 其他的就更不能講了.

親愛的 洋蔥,
其實我有中文翻譯啦! 但不能給你. 因為你會問這麼專業的問題, 代表你應該有相當的航空背景, 英文不會是問題吧!

2008-04-23 11:27:15 補充：
親愛的 洋蔥,

會問這問題的人, 一是學生準備學校考試或丙級檢定, 二是準備考CAA執照的人. 您是哪一種?
別偷懶, 學會了才會變成自己的知識. 直接給答案還是我的知識.

親愛的洋蔥

我幫你翻成中文

md90結構修理手冊51-10-03敘述如下：

1 。晶間腐蝕是一個攻擊晶界的物質。上述每個微小
穀類有一個明確的界限，從化學的角度來看，有別於從前
金屬內部的糧食中心。在晶界和晶粒中心，才能反應與對方
作為陽極和陰極，類似的兩極對立的一個電池，當接觸到一個
電解質或導電介質。

4 。開裂的金屬所造成的影響，同時雙方的壓力和腐蝕，是已知
由於應力腐蝕開裂。應力腐蝕表現為裂縫，在沒有金屬
必要時伴隨著明顯的腐蝕。應力，可應用於應力，或
一所造成的預壓部分，在安裝過程中。應力腐蝕開裂發生在
兩鋁，鎂合金以及鋼鐵。它通常只承認後，
裂縫發生後，通常需要更換的部件。

5 。最常見的腐蝕對鋁，鎂合金是對立面的。痘
第一次出現一個白色粉狀押金。不過，拋光，表面上揭示了微小的坑或
洞。在中度至嚴重的情況下，窖出庭，以清楚界定的丘陵和山谷的時候，
觀看通過放大鏡鏡頭。在案件稍有剝蝕，腐蝕，可拆除
酸蝕刻，清洗，或打磨，視情況而定。