镀锌卷红锈产生的根本原因
镀锌钢板表面腐蚀后，基体开始与空气中的水发生反应。基体的主要化学成分是铁和碳，它们产生原电池并发生原电池反应。反应方程式如下：
4Fe+6H2O+3O2=4（FeOH）3
2（FeOH）3=Fe2O3+3H2O
Fe2O3呈红色，是铁锈的主要成分。
上述证明
镀锌钢板材料表明，在80g/m2镀锌层和120g/m2镀锌钢板的试验和试验中，基本上产生了白锈。镀锌层120g/m2的无花镀锌钢板的红锈时间比镀锌层80g/m2的无花镀锌钢板晚。
如何处理镀锌板发白
看
镀锌钢板热镀锌产品湿后是否出现白色、氧化锌的表层，正常现象。镀锌后进行钝化处理。在这种情况下，不会出现白点问题。如果对耐腐蚀性要求较高，也可以考虑添加后密封剂
1.钝化质量问题。常见的情况是钝化不均匀或厚度不合格。
2.钢材表层残留水未经处理。压接时，钢材表面层有水分未干燥，或钝化后未完全干燥。
3.交通条件差。
具体表现如下：
1.在储存和运输过程中受潮或被雨水淋湿。
2.钢材成品存放时间过长。
由此可，镀锌钢板的防腐应从两个方面进行：
1.镀锌钢板需采用性能良好的钝化剂产品进行钝化处理。
2.不断改善镀锌钢板的储存条件。
After the surface of the non flowed galvanized steel plate is corroded, the substrate begins to react with the water in the air. The main chemical components of the substrate are iron and carbon, which produce the original battery and the original battery
reaction occurs. The reaction equation is as follows:
4Fe+6H2O+3O2=4（FeOH）3
2（FeOH）3=Fe2O3+3H2O
Fe2O3 is red, which is the main component of rust.
The above mentioned proof materials show that the white rust is basically produced during the test and test of 80g/m2 galvanized layer and 120g/m2 galvanized steel plate. The time of red
rust of the non flowered galvanized steel plate with the galvanized layer of 120g/m2 is later than that of the non flowered galvanized steel plate with the galvanized layer of 80g/m2.
How to deal with the white of galvanized sheet
See if hot
galvanized products appear white after wet, zinc oxide of surface layer, normal phenomenon. Passivation treatment is carried out after galvanizing. In this case, there will be no white spot problem. If the requirements for corrosion resistance are high,
the addition of post sealing agent can also be considered
1. It is the quality problem of passivation. The common situation is that the passivation is not uniform or the thickness is not up to the standard.
2. It is that the residual water
on the steel surface layer is not treated. When crimping, the surface layer of steel has moisture not dried, or it is not completely dried when passivation is done.
3. It's poor transport conditions.
The specific performance is as follows:
1. Wet or wet by rain during storage and transportation.
2. The finished steel products are stored for too long.
Therefore, we can know that the anticorrosion of galvanized steel plate should be done in two aspects:
1. It is necessary
to passivate galvanized steel plate with passivator products with good performance.
2. It is necessary to improve the storage conditions of galvanized steel plate continuously.
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