3PE防腐鋼管環(huán)氧粉末脫落的原因
對于3PE防腐鋼管環(huán)氧粉末脫落的原因，我們應該從以下幾個方面考慮。
The reason for the 3PE anti-corrosion epoxy powder off, we should consider the following aspects.
第一：要考慮環(huán)氧層與鋼管的附著力。FBE對鋼管除銹等級要求苛刻（Sa2.5），因此除銹后的鋼管要達到等級要求，可以參看國家標準，其中灰塵度等級、錨紋深度、錨紋形狀等因素對FBE附著都有影響，鋼管表面再涂環(huán)氧層之前，必須要經(jīng)過噴砂處理，目的是要達到除銹。 而除銹的效果，直接影響著環(huán)氧層對鋼管的附著力。
First: to consider the epoxy layer and adhesive steel. FBE for steel tube derusting grade demanding (Sa2.5), so the steel tube derusting grade requirements to achieve national standards, can see, the dust degree, anchor pattern, anchor shape on the FBE attachment can affect the surface of steel, then coated with epoxy layer before, must be processed by sandblasting, the purpose is to to rust. The descaling effect, directly affect the epoxy layer of adhesive steel.
第二：要考慮鋼管的用途，鋼管正常工作做的溫度，當溫度超出正常的適用范圍是，環(huán)氧層容易脫落。FBE粉末有其特定的工藝溫度要求和時間要求，要按照廠家制定的加熱溫度和制定的固化時間完成涂覆，實現(xiàn)FBE層與鋼體的粘結，可以參看FBE玻璃化轉變過程（玻璃態(tài)與高彈態(tài)之間的轉變）相關資料。因此可能生產(chǎn)工藝控制問題。
Second: to consider the use of steel pipe, steel pipe normal work temperature, when the temperature is beyond the scope of normal is, epoxy layer is easy to drop off. FBE powder has its specific process requirements of temperature and time requirements, to complete the coating according to the heating temperature of manufacturer and the curing time, adhesion of FBE layer and the steel body, can see the FBE glass transition process (transition between the glass state and high elastic state) relevant information. It may process control problems.
第三：與FBE原材料本身的質(zhì)量有關
Third: with the quality of FBE raw material itself
