Smart Inorganic and Organic Pretreatment Coatings for the Inhibition of Corrosion on Metals/Alloys

Zarras, Peter; Stenger‐Smith, John D.

doi:10.1016/b978-0-12-411467-8.00003-9

Cited by 27 publications

(25 citation statements)

References 176 publications

(135 reference statements)

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“…There are many surface treatments, such as anodizing, chemical conversion coating, or organic coatings. Many of them have traditionally employed chromates for both improving the corrosion resistance and enhancing paint chemical adhesion [4][5][6][7][8]. Chromates are used as inhibitors in closed systems and paints, in Cr-based chemical conversion coatings (CrCC), and in anodizing and sealing baths [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Application of Commercial Surface Pretreatments on the Formation of Cerium Conversion Coating (CeCC) over High-Strength Aluminum Alloys 2024-T3 and 7075-T6

Alba-Galvín

González-Rovira

Pedemonte

et al. 2021

Metals

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The selection of appropriate surface pretreatments is one of the pending issues for the industrial application of cerium-based chemical conversion coatings (CeCC) as an alternative for toxic chromate conversion coating (CrCC). A two-step surface pretreatment based on commercial products has been successfully used here to obtain CeCC on AA2024-T3 and AA7075-T6. Specimens processed for 1 to 15 min in solutions containing CeCl3 and H2O2 have been studied by scanning electron microscopy coupled with energy-dispersive X-ray analysis (SEM-EDX), glow discharge optical emission spectroscopy (GDOES), potentiodynamic linear polarization (LP), electrochemical impedance spectroscopy (EIS), and neutral salt spray (NSS) tests. SEM-EDX showed that CeCC was firstly observed as deposits, followed by a general coverage of the surface with the formation of cracks where the coating was getting thicker. GDOES confirmed an increase of the CeCC thickness as the deposition proceed, the formation of CeCC over 7075 being faster than over 2024. There was a Ce-rich layer in both alloys and an aluminum oxide/hydroxide layer on 7075 between the upper Ce-rich layer and the aluminum matrix. According to LP and EIS, CeCC in all samples offered cathodic protection and comparable degradation in chloride-containing media. Finally, the NSS test corroborated the anti-corrosion properties of the CeCC obtained after the commercial pretreatments employed.

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Section: Introductionmentioning

confidence: 99%

Application of Commercial Surface Pretreatments on the Formation of Cerium Conversion Coating (CeCC) over High-Strength Aluminum Alloys 2024-T3 and 7075-T6

Alba-Galvín

González-Rovira

Pedemonte

et al. 2021

Metals

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“…Even though only metals come to mind when describing corrosion, non-metallic materials, such as plastics, concrete, ceramics, rubber, etc. are prone to corrosion as well when exposed to different corrosive environments [4].…”

Section: Introductionmentioning

confidence: 99%

Green Corrosion Inhibitors

Goni¹,

Mazumder²

2019

Corrosion Inhibitors

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Corrosion is an unavoidable fact in everyday life but always receive attention to control due to its technical, economical, and esthetical importance. Corrosion inhibitors are one of the most widely used and economically viable methods protecting metals and alloys against corrosion. Typical corrosion inhibitors are bio-toxic organic compounds, which have serious issue on toxicity. Considering the toxicity of the inhibitors, there is a tremendous interest in searching for an eco-friendly, and non-toxic green corrosion inhibitor. This chapter briefly discusses the importance and different methods of corrosion inhibitors with a particular emphasis given to the discussion on the different characteristic feature of the green corrosion inhibitors reported in the literature as a comparative view of organic inhibitors.

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“…Applying zinc phosphate coating on reinforcing steel will probably be a vital approach in the future [9][10][11][12][13][14]. The phospahting process has been known for over a century [15]. It was extensively used in the automobile and appliance industries [16,17].…”

Section: Introductionmentioning

confidence: 99%

“…It was extensively used in the automobile and appliance industries [16,17]. This treatment primarily provides an inexpensive [17,18], non-toxic [19,20], reasonably hard, highly adherent and electronically non-conducting phosphate coating [15]. The insulation properties make an important contribution to the prevention of reinforcement corrosion [14].…”

Section: Introductionmentioning

confidence: 99%

Modified Zinc Phosphate Coatings: A Promising Approach to Enhance the Anti-Corrosion Properties of Reinforcing Steel

al-Swaidani¹

2017

MOJCE

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Smart Inorganic and Organic Pretreatment Coatings for the Inhibition of Corrosion on Metals/Alloys

Cited by 27 publications

References 176 publications

Application of Commercial Surface Pretreatments on the Formation of Cerium Conversion Coating (CeCC) over High-Strength Aluminum Alloys 2024-T3 and 7075-T6

Application of Commercial Surface Pretreatments on the Formation of Cerium Conversion Coating (CeCC) over High-Strength Aluminum Alloys 2024-T3 and 7075-T6

Green Corrosion Inhibitors

Modified Zinc Phosphate Coatings: A Promising Approach to Enhance the Anti-Corrosion Properties of Reinforcing Steel

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