摘要:
针对锰系磷化成渣多、磷化层色度不均匀、磷化层表面容易出现发白挂灰、表面泛黄等问题，结合多年锰系磷化生产实践及影响因素研究，分析认为磷化温度、磷化时间、磷化酸比、Fe2+浓度是影响锰系磷化质量的关键因素。指出油套管接箍最佳的锰系磷化工艺参数为：磷化温度≥95℃，总酸点60，不同钢级采用不同酸比（低钢级酸比7～8为佳，高钢级酸比9以上较好），磷化时间大于20 min。得到的磷化膜分布均匀、结晶细致、厚度均匀，具有良好的耐腐蚀性、耐磨性和抗黏结性。
Abstract:
Addressing the problems concerning the manganese series phosphorisation process such as excessive slag formation, uneven color of the phosphorised layer, and the while, gray-striped or yellow phosphorised layer surface, etc., based on the company's years experience in manganese series phosphorisation operation, factors affecting phosphorisation quality are studied and analyzed.As a result, it is identified that the key factors include temperature, time, phosphoric acid proportion, and Fe2+ concentration for phosphorisation operation.It is affirmed that the best parameters of manganese series phosphorisation process for oil tubing/casing couples are temperature: ≥ 95℃, total acid point:60, acid proportion:variable as per steel grade(for low grades, 7~8 is the best, and for high grades, over 9 is acceptable), and time:over 20 min.Based on these parameters, the phosphorized film will possesses advantages such as homogeneous distribution, fine crystallization, even thickness, excellent resistances against corrosion, wearing and bonding.
下载:
