Local copper flaring analysis on the outer wall of 20 steel pipes

1.1 20 steel pipe externals, local copper

This pipe is analysed by a friend without a detailed process. The main process is assumed to be the contour, thermal perforation, acid lubrication, cold extraction, fire retreat, or straight-on-the-line.

A group of steel tubes have only a few expenses, with local fractures of the outer wall, large openings of the cavities in a sawn-articular form, and copper metal on the surface of the fracture (figure 1.2-1).

The most visible of the cracks is the luminous rim of the gold, which is distributed 45 degrees in the direction of pull, with copper metal and iron oxide in the cracks, and with yellow metal on the crystal line (figure 1.2-2 ~1.2-4), which is distributed only on the surface of the fracture.

The cavity shape, distribution and test results make it possible to exclude the tube and thermal perforation factors, but it is not possible to determine the origin of the copper metal. Only a few of the steel tubes are currently suffering from such defects, which should be caused by some accident during the course of the steel pipe processing.

The following are the products that will be used for gold phase:

i. Scraper of the gold sample to sample the gold phase

II. Kim Co-simworks:

Fuyun materials gold-specific sandpaper: 230mm diameter without glue 600# 1200# 2500#   

III. LEAVE THE FIELDS OF THE KING PHOTOS:

Fuyun materials gold-phased photo fabric: 230 mm in diameter velvet/splendon

Fuyun materials, Fresco-Frestilt Spraying: 1/3 micrometre

Fuyun machine: manual in no-extreme-speed grinder

Pressure: Fixed, neutral, stable, without too much pressure.

Time: 2-5 minutes, whichever is the same, the scratches of the thin sandpaper are almost removed.

Rotation speed: 200 turns

Raarboard direction: Clockwise

During polishing: The polished rags need to be immersed early, the polished fluid is down in the centre position and handwashing is added to its lubrication.

Pour: A little bright, no scratches, and can move on.

During polishing: The polished rags need to be immersed early, the polished fluid is down in the centre position and handwashing is added to its lubrication.

Pouring: The brightness is very high.

Corrosion observation:

Gold-photo microscope (magnification multiple: 50X, 100X, 200X, 500X, 1,000X)

The following are used for corrosive reagents: