摘要
针对石油及化工设备在苛刻高温腐蚀条件下工作,其零件腐蚀破坏日益严重的现状,采用Q235钢为基体材料,对自行研制的NiCrMo涂层在750℃涂盐腐蚀中的热腐蚀行为进行了研究,并与母材Q235钢的性能进行了比较。采用金相显微镜、配有能谱分析仪的扫描电镜以及X射线衍射仪等检测设备对腐蚀产物的形貌和相组成等进行了分析。结果表明,在母材Q235钢表面涂覆层镍铬含量一定,有适当钼的NiCrMo涂层时,能形成对涂层进行保护的氧化膜,提高母材Q235钢的耐高温热腐蚀性能。这种镍基合金制备成涂层具有优良的抗热腐蚀性能,适于作为石油化工设备的防护材料。
The petroleum and the chemical engineering equipments were broken increasingly under the rigorous working condition of the hot corrosion. Nickel-based cored wire was sprayed to surface of Q235 steel to resist hot corrosion. The hot corrosion behavior of NiCrMo coatings by oneself research to manufacture in the salt corrosion at 750℃ were studied, compared with the performance of the material Q235 steel. Metallographical microscope and SEM were used to observe the morphology of the corrosion products and X-ray diffraction was used to determine the phase structures. Results show that when nickel-based cored wire which contains the certain content of Ni, Cr and Mo, is sprayed to surface of Q235 steel, can become the oxidized film to protect coatings and raise the performance material Q235 steel to resist the hot corrosion. NiCrMo coatings have superior function of resist hot corrosion, is suitable for use in the protection material of the petroleum and the chemical engineering equipments.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第A02期335-338,共4页
Rare Metal Materials and Engineering
基金
北京市科技计划项目(Y0404007040111)
