Corrosion Resistance Reliability of Ni-P Electroless Coating on Heat Exchanger

There are many engineering applications of Ni-P electroless coatings on heat exchangers in petrochemical industry,their anticorrosion properties are different.Based on the coating processing technology in heat exchanger tube side and shell side,the relationship of coating quality and corrosion resistance is analyzed,including coating thickness,porosity,ronghness,phosphorus content,combining force and homogeneity etc.The protective measures are presented to promote the corrosion resistance of Ni-P coatings on heat exchangers.