Božić Dubravka, Samardžija Marina, Kurtela Marin, Keran Zdenka, Runje Biserka
Department of Quality, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia.
Department of Chemistry, Faculty of Mining-Geology-Petroleum Engineering, University of Zagreb, 10000 Zagreb, Croatia.
Materials (Basel). 2023 Jan 12;16(2):758. doi: 10.3390/ma16020758.
This paper presents the conformity assessment process of the epoxy coating thickness applied on water pipes made of gray cast iron with the specifications given for this kind of coating appliance. An epoxy coating was applied to prevent a special form of corrosion called the graphitization of cast iron. In order for the pipe to withstand its designed service life, it is necessary to ensure the required thickness of the applied coating. In accordance with the EN 877 norm, the thickness of the epoxy coating on the pipes for the projected corrosiveness of the environment C4 and the durability of 20 years is at least 70 μm and this indicates the required accuracy of the product. To achieve the desired product quality, statistical control of the coating application process was carried out and the impact of uncertainty associated with the measurement result was analyzed. Considering the quality of the coating application process and the quality of the measuring system, and to ensure the quality of products and to reduce consumer risk, the optimal thickness of the coating was determined.
本文介绍了根据此类涂层施工规范，对灰口铸铁水管上环氧涂层厚度的合格评定过程。环氧涂层用于防止一种特殊形式的腐蚀，即铸铁的石墨化。为使管道能够承受其设计使用寿命，必须确保所涂覆涂层的规定厚度。根据EN 877标准，对于环境腐蚀性为C4且耐久性为20年的管道，环氧涂层厚度至少为70μm，这表明了产品所需的精度。为实现理想的产品质量，对涂层施工过程进行了统计控制，并分析了与测量结果相关的不确定性影响。考虑到涂层施工过程的质量和测量系统的质量，为确保产品质量并降低消费者风险，确定了涂层的最佳厚度。
