一、Fundamental

Iron and steel multi-seepage zinc compound containing anti-corrosion technology, refers to the vacuum heating conditions of steel and zinc, aluminum, rare earth full contact, through a very complex physical and chemical reaction process, so that zinc, aluminum, rare earth atoms evenly diffuse into the steel surface layer.

二、Multi - element zinc compound anti - technology and Dacromet, electro - galvanized, hot - dip galvanized contrast characteristics.

Multi-layer zinc compound layer is very uniform and dense, the most suitable for fastener thread anti-corrosion treatment to ensure that the role of fastening. The thickness of the multi-layer zinc layer of the root and the cusp of the treated thread is almost the same. The hot galvanized thread surface is uneven, the thickness is difficult to control, prone to: "bite" phenomenon, affecting the role of fastening. Multi-seepage zinc compound process has a prominent advantage when dealing with more complex parts.

Multi-layer zinc compound layer and iron potential difference is small, as the anode protective layer, so the same thickness of the multi-zinc composite layer than the galvanized, hot-dip galvanized surface pure zinc layer corrosion time.

Dacromet, galvanized and steel matrix adhesion is poor, galvanized pieces were impacted, prone to peeling off the coating, and multi-zinc composite process formed by the composite layer of diffusion-type metallurgical combination, strong adhesion, easy to peel off.

Multi-element zinc compound technology to ensure the mechanical properties of its material characteristics, the workpiece is not deformed, and hot galvanized can not meet the above requirements.

Multi-layer zinc composite layer with high hardness and wear resistance. The uniform hardness of the multi-element zinc compound treatment is nearly six times higher than that of the hot-dip galvanizing, and there is no hydrogen embrittlement and good mechanical properties. These are the shortcomings of Dacromet, galvanized and hot-dip galvanized.

Multi-layer zinc composite layer also has a good heat, acid, alkali, wear resistance, can be used in a variety of harsh conditions.

三、Application scope

Vacuum zinc infiltration technology has been widely used in automobile, ship, electric power, transportation, machinery, dirty days and other industry sectors, especially for standard parts, stamping parts, anchor chain, hardware, profiles, cast steel and irregular parts and other anti-corrosion treatment .

Electro - galvanized, hot - dip galvanized, Dacromet, multiple zinc - zinc composite layer performance comparison table