ABRASION CORROSION OF HIGH SPEED STEEL
Adel Aly Shawky Aly Missalam;
Abstract
A study of the synergetic effect of corrosion and abrasion (mechanical and chemical wear) on H.S.S. alloy was done to determine its resistance to this effect. The experimental work needs to design a special apparatus to study the mechanical and electrochemical combined processes in abrasion and corrosion system,
simultaneously, in the presence of different media, under different loads and at
.• different speeds. Also the corrosion and abrasion were studied individually.
This study was done basically on SW18 type ofH.S.S. Other experiments were done on stainless steel 304 and mild steel specimens for comparison of H.S.S. results with their results to determine the degree of resistance of H.S.S.
Different loads 5, 1, 1.5, 2.5, 3.5 and 5 kg were used at different speeds
150, 250 and 350 rpm in different media kerosene, distilled water, tap water and salt water in different concentration 0.1%, 1%,3% and 10% of NaCl.SomeH.S.S. specimens were annealed at different temperatures 600°C, 950°C and 1050°C. The corrosion and abrasion tests were done to those specimens to determine the effect of annealing process on them. The surface temperature during abrasion of H.S.S. specimens was calculated. The hardness for some tested H.S.S. specimens were measured on the surface and gradually along the depth. The chemical and mechanical wear was measured using mechanical indicator. The electrochemical measurements were recorded at specified periods oftime and at specified potentials to study the corrosion in the presence of abrasion. The abrasion alone was studied
using mechanical indicator in presence of kerosene medium.
The main results of the experimental work explain the importance of: less reactive layer formation on the abrading surface with increasing load and speed, the importance of the different media in increasing or decreasing the abrasion corrosion rate on the tested specimens surfaces, and also the effect of annealing process and
the rise of its temperature on decreasing the abrasion corrosion resistance ofH.S.S.
'•
alloy.
simultaneously, in the presence of different media, under different loads and at
.• different speeds. Also the corrosion and abrasion were studied individually.
This study was done basically on SW18 type ofH.S.S. Other experiments were done on stainless steel 304 and mild steel specimens for comparison of H.S.S. results with their results to determine the degree of resistance of H.S.S.
Different loads 5, 1, 1.5, 2.5, 3.5 and 5 kg were used at different speeds
150, 250 and 350 rpm in different media kerosene, distilled water, tap water and salt water in different concentration 0.1%, 1%,3% and 10% of NaCl.SomeH.S.S. specimens were annealed at different temperatures 600°C, 950°C and 1050°C. The corrosion and abrasion tests were done to those specimens to determine the effect of annealing process on them. The surface temperature during abrasion of H.S.S. specimens was calculated. The hardness for some tested H.S.S. specimens were measured on the surface and gradually along the depth. The chemical and mechanical wear was measured using mechanical indicator. The electrochemical measurements were recorded at specified periods oftime and at specified potentials to study the corrosion in the presence of abrasion. The abrasion alone was studied
using mechanical indicator in presence of kerosene medium.
The main results of the experimental work explain the importance of: less reactive layer formation on the abrading surface with increasing load and speed, the importance of the different media in increasing or decreasing the abrasion corrosion rate on the tested specimens surfaces, and also the effect of annealing process and
the rise of its temperature on decreasing the abrasion corrosion resistance ofH.S.S.
'•
alloy.
Other data
| Title | ABRASION CORROSION OF HIGH SPEED STEEL | Other Titles | التأكل الكيميائى والميكانيكى لصلب السرعات العالية | Authors | Adel Aly Shawky Aly Missalam | Issue Date | 1999 |
Attached Files
| File | Size | Format | |
|---|---|---|---|
| B11723.pdf | 922.42 kB | Adobe PDF | View/Open |
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