The antibacterial activity for pathogenic and food-poisoning bacteria and affinity for biomaterial adsorption of electroless Ni-P-PTFE plated composite coating on stainless steel were studied. The antibacterial abilities of electrolytic Ni plated and electroless Ni-P plated coatings on stainless steel for Escherichia coli increased with decreasing their spontaneous electrode potentials, suggesting that the amount of Ni2+ dissolved from the plated coatings was correlated with the magnitude of antibacterial ability. Growth of pathogenic and food-poisoning bacteria, i. e., Escherichia spp. (co...