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Ze-Min C.,Langfang Normal College Langfang | Zhi-Li W.,Langfang Normal College Langfang | Qiao-Yun Z.,Langfang Normal College Langfang
Advanced Materials Research | Year: 2012

for the ratio from orthogonal experiment, the phosphating solution which prepared with zinc oxide, phosphate acid, tartaric acid, sodium molybdate, Ma Jif salt, sodium fluoride, phytic acid, chrome alum to do the single factor variable experiments. For the various factors effect on the corrosion resistance of phosphating film to do the in-depth analysis. Preliminary analyse the film formation mechanism via the scan curve of the potential to the time, and determined the best film-forming time. © (2012) Trans Tech Publications, Switzerland. Source


Ze-Min C.,Langfang Normal College Langfang | Zhi-Li W.,Langfang Normal College Langfang | Qiao-Yun Z.,Langfang Normal College Langfang
Advanced Materials Research | Year: 2012

This study through a lot of theoretical analysis and experimental exploration, come to add phytic acid and chromium alum in the traditional zinc phosphating solution for phosphating solution film-forming speed and improve the film density has a distinct effect, and further by orthogonal experiments and the final assessment of preferred a group of environmental, low-temperature, and no sediment of new phosphating process. The composition of the phosphating solution is as follow: zinc oxide 0.5g/L; phosphating acid 5.0mL/L; tartaric acid 0.75g/L; sodium molybdate 0.6g/L; Ma Jif salt 2.0g/L; NaF 0.25g/L; phytic acid 0.4mL/L; chromium alum 1.0g/L; free acidity 2-4 points; total acidity 15-18 points. The experimental results show that: the new phosphating process of this study reduces the handling costs, the stability bath performance, little changes in acidity, in the case of do not need to adjust the surface at room temperature, to forming a completed, dense, strong corrosion-resistant color phosphate crystal film on metal surface within 5 minutes, the copper sulfate bit time is 2.5mins, with good adhesion to 0, the impact resistance is 50kg/cm, it can be used in conjunction with a variety of coating processes. © (2012) Trans Tech Publications, Switzerland. Source

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