求翻译：当有外加磁场时，复合镀层的沉积速度、复合镀层中的粒子含量、复合镀层的孔隙率都比没有外加磁场时要高，说明外加磁场影响复合镀层的耐蚀性，但是有外加磁场时复合镀层的表面质量有所改善。是什么意思？

When the external magnetic field, the composite coating deposition rate, the particle content in the composite coating, the porosity of the composite coating is better than no external magnetic field is higher, indicating that the applied magnetic field affect the composite coatings, but there is an

If there is a magnetic field, plus composite coating on the deposition rate, in the composite coated particulates, composite coating on the porosity is better than no magnetic field is applied to high magnetic fields, plus composite coated for corrosion resistance, but there is a magnetic field plus

When has the sur- magnetic field, in the compound coating deposition rate, the compound coating granule content, the compound coating factor of porosity all does not have when the sur- magnetic field must be higher than, shows sur- effect on magnetic field compound coating the corrosion resistance,

When there is when the applied magnetic field, composite coating deposition rate, particle content in composite coatings, composite plating porosity are higher than when there is no external magnetic field, description of external magnetic field affect the corrosion resistance of composite coatings,

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