Medium grits

Operating under aqueous conditions can also assist in the removal of residual abrading medium and any other contaminants and keeps dust generation to a minimum. If wet techniques are used, then the substrate should be thoroughly dried immediately after pretreatment this is particularly true for ferrous materials. In this latter case, another approach is to add a rust inhibitor to the water-grit medium. 

Acetal (copolymer) Acetone 1. Abrasion. Grit or vapor blast, or medium-grit emery cloth followed by solvent degreasing. 2. Etch in the following acid solution for 10 s at 25°C Potassium dichromate 75 Distilled water 120 Sulfuric acid (96%) 1500 Rinse in distilled water, dry in air at RT. For general-purpose bonding For maximum bond strength. ASTM D 2093... 

Cooked cereal like oatmeal, oat bran or grits 1 medium bowl ... 

Recommended SF PDI values for various applications are shown in Table 19.4 (Fulmer, 1989ab). Domestic manufacturers generally offer SFs with PDIs of 90 (enzyme-active), 70, 65, and 20, with granulations of U.S. 100 and 200 mesh. Grits are offered in coarse, medium, and fine granulations. The bulk density of heat-treated... 

Abrade with medium grit abrasive paper or an appropriate grit blaster (when using abrasive paper care should be taken to select one with a suitable binder). 

Conversion coatings offer many of the features identified as being desirable on a properly pre-treated metal surface consequently, they have been applied to a range of metals for the enhancement of structural adhesion. A number of studies have demonstrated that properly optimized conversion coatings are comparable to the anodic oxides in terms of providing durability with aluminium.Other studies have demonstrated variable adhesion performance with conversion coated aluminium adherends. A recent study has shown phosphated medium carbon steel to give better bond durability than grit-blasted and silane-treated material. ... 

A grit blasting often forms the basis for surface preparation. The equipment, which may be used needs to offer a number of features. Of these the first is that the inserts should be presented to the grit stream in a uniform and continuous pattern so that the blasting medium is distributed evenly over the work area. The second requirement is that of dust removal. The process continuously removes material from the inserts and at the same time the grit itself is reduced in size. This dehris must be removed so that the size distribution of the grit remains constant to ensure that a clean, uniform surface is maintained. 

Nelson PK (1998) Neurointerventional management of intracranial aneurysms. Neurosurg Clin North Am 9 879-895 Nelson PK, Levy DI (2001) Balloon-assisted coil embolization of wide-necked aneurysms of the internal carotid artery medium-term angiographic and clinical followup in 22 patients. AJNR Am J Neuroradiol 22 19-26 Newell DW, Elliott JP, Eskridge JM, Winn HR (1999) Endovascular therapy for aneurysmal vasospasm. Grit Care Clin 15 685-699, v... 

Diallyphthalate plastics Degrease with solvent, unless using cyanoacrylates (see notes) Abrade with medium-grit emery paper Repeat degreasing... 

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