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海藍(lán)色彩涂卷基板——熱鍍鋅板白銹和黑斑產(chǎn)生的原因有：黑斑是白銹進(jìn)一步氧化形成的。白銹產(chǎn)生的原因主要有：1、鈍化不良，鈍化膜厚度不夠

或不均勻；2、表面未涂油或帶鋼表面殘留水分；3、卷取時(shí)帶鋼表面含有水分；4、鈍化未完全烘干；5、在運(yùn)輸或儲(chǔ)存中受潮或雨水淋濕；

6、成品存放時(shí)間過長；7、鍍鋅板與其他酸堿等腐蝕性介質(zhì)接觸或存放在一起。成品在庫中很長允許存放三個(gè)月，以避免存放過久產(chǎn)生氧化。

熱鍍鋅板長度，鍍鋅鋼板的長度不允許有負(fù)值公差，很大不允許超過+6mm。彩涂卷如果選用不當(dāng)，結(jié)果不是材料標(biāo)準(zhǔn)高，造成浪費(fèi)。

The causes of —— hot-dip galvanized plate white rust and black spots are as follows: black spots are formed by further oxidation of white rust.

The main causes of white rust are: 1, poor passivation, passivation film thickness is insufficient or uneven; 2, surface is not oil or strip surface residual water;

3, strip surface contains water; 4, passivation is not completely dried; 5, damp or rain in transportation or storage; 6, finished products storage time is too long;

7, galvanized plate contact or stored together with other corrosive media such as acid and alkali.Finished products are allowed to be stored for three months to

avoid excessive oxidation.The length of hot galvanized plate, the length of galvanized steel plate does not have negative tolerance, very not allowed to

exceed + 6mm.If the color coating roll is not selected properly, the result is not a high material standard, resulting in waste.