Investigation of the Corrosion Behavior of Electroless Ni-P Coating in Flue Gas Condensate

Abstract

Abstract:The corrosion behavior of Ni-P coating deposited on 3003 aluminum alloy in flue gas condensate was investigated by electrochemical approaches. The results indicated that nitrite acted as a corrosion inhibitor. The inhibiting effect of nitrite was reduced in solutions containing sulfate or nitrate. Chloride and sulfate accelerated the corrosion of Ni-P coatings greatly. This can provide important information for the researchers to develop special Ni-P coatings with high corrosion resistance in the flue gas condensate.

Characterization of Electroless Ni–P Coating Prepared on a Wrought ZE10 Magnesium Alloy

“…However, the deposited Ni-P amorphous coatings improve the corrosion resistance of magnesium, the inherent columnar microstructure of the coating does not provide the best protection against the corrosion. The high concentration of inter-column defects, such as microvoids and micropores, [26,27], form channels where the corrosion ions and environment can pass through the coating and react with the substrate. The presence of microcavities was not evident between nodular cusps of the deposited coating (Figure 2b), which is in agreement with observations in [28].…”

Corrosion inhibition of 3003 aluminum alloy by cerium chloride-sodium nitrite blend in flue gas condensate

“…The flue gas condensate was prepared by HCl, HNO 3 , NaNO 2 , and H 2 SO 4 with deionized water. Its components are shown in Table , the details of which are described in our previous studies . The temperature was maintained at 298 K. The samples were immersed for about 40 000 s to reach an almost stable state at first.…”