钢铁热碱性氧化膜层蓝黑、美观,但膜层的防护性能很低,使用中多数是作为油漆的底层,少数情况下作为在大气条件下必须涂防锈油的装饰层(如枪管等),且生产成本高,耗能大。为此,我们研究了钢铁常温发黑及磷化复合表面处理技术,它集发黑及磷化技术之所长,既克服了发黑处理膜层较薄、耐蚀性差等缺点,又克服了磷化处理膜硬、脆、表面粗糙等缺点,使这种复合处理膜具有极好的耐蚀性、耐磨性、优良的润滑性 Steel thermal alkaline oxide film blue and black, beautiful, but the protective performance of the membrane is very low, the majority of the use as a paint bottom, in a few cases as a decorative layer must be coated with rust-proof oil under atmospheric conditions (such as barrel Etc.), and high production costs, energy consumption. To this end, we studied the room temperature blackening and phosphating steel composite surface treatment technology, which sets the director of black and phosphating technology, not only to overcome the darker film processing thin, poor corrosion resistance shortcomings, but also to overcome Phosphating film hard, brittle, the surface roughness and other shortcomings, so that this composite film has excellent corrosion resistance, wear resistance, excellent lubricity