Surface Preparation of Metals

Chemical treatments are usually most effective with aluminum alloys, especially when long-term environmental exposure is required. The sulfuric acid—dichromate etch FPL etch, named after Forest Products Laboratory, US Department of Agriculture www.fpl.fs.fed.us) has been used successfully for many decades. Techniques more recently developed are often modifications of the FPL procedure. Other important methods include chromate conversion coating and anodizing. Corrosion-resistant adhesive primer, as well as anodic and chromate conversion coatings, helps to prevent corrosive failure of adhesion.  

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Development of Accelerated Performance Tests for Paint-Phosphate-Metal Systems. Surface Preparation of Metals , Aberdeen Proving Ground, USA (1955)... 

Clearfield, H. M., et al., Surface Preparation of Metals, in Adhesives and Sealants, vol. 3, Engineered Materials Handbook, ASM International, Materials Park, OH, 1990. 

Scanning electron microscopy is essentially a technique for the observation of surfaces and is thus especially applicable to the examination of adherends and failure surfaces, observations of the results of surface preparation of metals and polymers, investigations of failure modes (see Stress distribution mode of failure), and examinations of finishes on fibres are typical of work reported in the literature. 

EN 13887 Structural adhesives. Guidelines for surface preparation of metals and plastics prior to adhesive bonding. 

EN ISO 8504-1 Preparation of steel substrates before application of paints and related products. Surface preparation methods. General principles. ISO 17212 Structural adhesives. Guidelines for the surface preparation of metals and plastics prior to adhesive bonding. 

These various techniques will be explained in the relevant chapters, for instance chemical treatments of metals are explained in a specific chapter titled Surface Preparation of Metals Before Bonding , in Volume 1, and also in the chapters Bonding of Metals and Automotive Adhesives and Sealants . Preparation of plastics before bonding are explained in the chapter Bonding of Plastics and so on. 

Rogers, N. L., Surface Preparation of Metals, in M. J. Bodnar, Ed., Structural Adhesive Bonding, Interscience, New York, 1966. 

Consideration is given to the different steps involved in rubber-to-metal bonding, including surface preparation of metal substrates, the application of primers and adhesives, and moulding, vulcanisation, curing and posttreatment processes. Factors which can lead to weak adhesion and bond failure are discussed, and approaches to the identification and correction of such problems are outlined. 

This chapter has been adapted from Surface Preparation of Metals in Surface Treatment of Materials for Adhesion Bondings... 

Rogers NL. Surface preparation of metals for adhesive bonding. In Bodnar MJ, ed. Applied Polymer Symposia No. 3, Structural Adhesives Bonding. New York, NY Interscience Publishers 1966. pp. 327—340. 

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