| Effect of Environmentally Friendly Water-soluble Chromium-free Coating on Peeling Strength of Metal/NR Hot Vulcanization Bonding |
| Received:May 16, 2023 Revised:May 16, 2023 |
| DOI：10.12136/j.issn.1000-890X.2023.8.0578 |
| Key Words: water-soluble chromium-free coating；metal；NR；hot vulcanization bonding；peeling strength |
| Author Name | Affiliation | E-mail | | SUN Chongzhi | Beijing University of Chemical Technology | 616283206@qq.com | | SHI Yayu | Shanghai KaiMiter Chemical Co.，Ltd | | | LI Yong | Shanghai Junyi Chemical Co.，Ltd | | | Shipeng Wen* | Beijing University of Chemical Technology | wensp@mail. buct. edu. cn |
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| Abstract: |
| The effects of surface treatment process of metal on the peeling strength of metal/natural rubber（NR） hot vulcanization bonding were studied.The results showed that degreasing，phosphating and silane treatments could effectively increase the peeling strength of metal/NR hot vulcanization bonding.Two times of impregnation with environmentally friendly water-soluble chromium-free coating Gardolene D6890 in the three kind of treatment processes could further increase the peeling strength of metal/NR hot vulcanization bonding.Moreover，the peeling strength of metal/NR hot vulcanization bonding could also be improved by reasonable control of the phosphating time of metal，the mass fraction of Gardolene D6890，the impregnation temperature and the drying temperature of the impregnated metal.It was found that when the phosphating time of metal was 90 s，the mass fraction of Gardolene D6890 was 5% and the immersion temperature was 55 ℃，the peeling strength of metal/NR hot vulcanization bonding was the largest，and increasing the drying temperature of Gardolene D6890 impregnated metal could further increase the peeling strength of metal/NR hot vulcanization bonding. |
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