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N, N, N', N'-tetramethylethylenediamine on anticorrosion ability of micro-arc oxide coatings formed on magnesium alloy AZ91D.

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SFEN Oxide coatings on AZ91D alloy were prepared using micro-arc oxidation techniques at a low applied voltage in the Si-P electrolyte with the additive, hexamethylenetetramine or tetramethylethylenediamine (TMEDA). The additives in the Si-P electrolyte smoothed the cracks/pores on the oxide coatings. The 0ú1M TMEDA in the Si-P electrolyte improved two orders of the magnitude of the anticorrosion ability from bare AZ91D alloy to the anodic coating, which was prepared by the Si-P electrolyte with 0ú1M TMEDA. The surface roughness R a was reduced from 10ú2 to 1ú1 µm, when the oxide coating was anodised in the low breakdown voltage and low thermal stress in the Si-P electrolyte with 0ú1M TMEDA. In this work, the aforementioned additives in the Si-P electrolyte smoothed the surface of the oxide coating and modified the crystalline structure, resulting in a better anticorrosion ability.

N-doped TiO2/ZnO composite powder and its photocatalytic performance for degradation of methyl orange.

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N-heterocyclic compounds as additives in AC colouring of anodised aluminium from nickel sulphate solution. Pt 1. Effect on colour intensity and probe uniformity

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Organic additives were used in electrocolouring of anodised Al (alternating current). Their structures are shown, their effects on pH and throwing power tabulated. Optical absorbance is plotted as function of distance from counter electrode. Empirical polynomial curve-fitting equations are shown. 22 refs

N-heterocyclic organic compounds as additives for AC electrolytic colouring of anodised aluminium from nickel sulphate solutions. II. Mechanism of action

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Pt 2. shows faradaic colouring current densities vs. time, Bode plots with equivalent circuits and table listing resistance of barrier layer & absorbent layers. Capacitance is also plotted vs. colouring time as is nickel content in anodic oxides. Potentiodynamic curves for Ni electrodep'n on anodic oxide films are shown. Structural formulae show piperidine-based additives. 15 refs

N-methylpyrrolidone & Dowanol DPM as replacements for chlorinated solvents in ultrasonic cleaning

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Table lists physical & chemical solvent properties. Graphs plot cavitation intensity. Ultrasound radiation pressures were meas'd vs. temperature. Confirmed that title solvents are suitable for use, in terms of their acoustical properties (cavitation & radiation pressure). 12 refs

n-propyl bromide as a degreasing solvent

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Hymns the title solvent and lists many benefits which offset its admittedly higher cost, and notes its very low level of toxicity.

N-Propyl Bromide as cleaning & degreasing solvent

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Title, somewhat controversial solvent is described, properties are listed & compared to 1,1,1 trichloromethane & trichloroethylene. Cleaning properties are discussed, table lists solvating properties for this, prev. noted solvents, methylene chloride & perchloroethylene.. Kauri Butanol No; Hildebrand No, Hansen parameter, hydrogen bonding & other properties are listed. Histo shows relative solvating properties for 4 lubricants & 3 different soils. Histo shows spreadig properties (on matt stainless steel) which are good. Discussion of nPB in terms of environmental legislation & compliance. 14 refs.

n-propyl bromide can be real alternative to chlorinated solvents

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Letter responds to previous comments which criticised brominated solvents. Writer cites official approvals & offers details on environmental impact of Br solvents.

N-Rich Zirconium Nitride Films Deposited by Unbalanced Magnetron Sputtering Enhanced with a Highly Reactive MW-ECR Plasma.

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N-Type Doping of Nanocrystalline Diamond Films with Nitrogen and Electrodes made therefrom.

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An electrically conducting n-type ultrananocrystalline diamond (UNCD) having no less than 10<19 >atoms/cm<3>of nitrogen and method for making this. A method for predictably controlling the electrical conductivity is also noted.

N2/H2 plasma surface modifications of polystyrene inhibit the adhesion of multidrug resistant bacteria.

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NACE issues new marine coating standard.

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New standard is designed to link with IMO regulations. SP0111-2011 "Coating Technical File in Accordance with IMO Performance Standard for Protective Coatings. Applies to ship's ballast tanks and double skin spaces.

NACE Standard Recommended Practice RP0188-90. Discontinuity (Holiday) Testing of Protective Coatings

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Provides procedure for electrical detection of minute discontinuities in coating systems that are liquid-applied to conductive substrates other than pipelines. Sections include: 1. General Information; 2. Definitions, 3. Low Voltage Wet Sponge Testing, 4. High Voltage Spark Testing, 5. Testing of Repaired Area, and 6. Safety.

NACE Standard Recommended Practice RPO274-93. High Voltage Electrical Inspection of Pipeline Coatings Prior to Installation

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Covers electrical inspections (holiday detection) of external coatings on pipelines. Recommendations are made concerning identification of defects in coatings on pipelines, descriptions of equipment for testing, proper use of equipment, recommended min. voltages vs coating thickness, grounding practices, equipment travel speed, how to make voltage measurements, surface properties influencing tests and care of equipment. Calibration of voltage requirements using intentional holidays is described also.

NACE Standard Recommended Practice RPO375-94. Wax Coating Systems for Underground Piping Systems

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Presents information on selection, testing and application of hot and cold wax-type coatings and associated wrapping systems for use on external surfaces of steel pipes for underground exposures. Included methods for pipe surface preparation, application of primers, coatings and wrappers, physical properties of coating and wrapping materials, procedures for hand or machine application, storage, handling and installation of coated pipe.